Enable JavaScript to run this app.
Skip to main content
OpenTable logo
Contemporary Canadian & From Scratch Cooking - Undefined, Hamilton, ON

Undefined

4.7 (853)
CAN$31 to CAN$50
Bistro
35 King William St, Hamilton, ON L8R 1A1

Make a reservation

2 people
7:00 PM
Booked 9 times today
Experiences are available.

About this restaurant

  • Great for creative cocktails
  • Good for special occasions
  • Innovative
UnDefined has been changing the way people think about dining out in Hamilton. Voted one of Hamilton's best all-around restaurants for 2021, 2022, 2023, we are making a big impact on King William Street. With an evolving, seasonal and whimsical approach, our passion is what drives us every day. We strive to push the limits, and for our team, it is just what we love to do. We cook from scratch because that is just the way it should be. We love to challenge the way we all think about dining out.

We believe that there is no reason to put yourself in a box when going out with friends, so we do not do that here. Whether it is a night out with friends, an intimate dinner for two, or just something extraordinary, We are not afraid to take the familiar and turn it into something memorable. If it tastes good, we will put it on a plate, in a glass, or whatever. Our mantra is as simple as eat, drink, and enjoy!

Dining areas

Additional information

  • Dining style
    Casual Elegant
  • Price
    CAN$31 to CAN$50
  • Cuisines
    Bistro, Farm-to-table, Cocktail Bar
  • Hours of operation
    Brunch Sat, Sun 10:00 am–3:00 pm Lunch Wed–Fri 11:30 am–4:00 pm Dinner Daily 4:00 pm–10:00 pm Bar Fri, Sat 10:00 pm–12:00 am
  • Phone number
  • Payment options
    AMEX, Mastercard, Visa
  • Dress code
    Business Casual
  • Neighborhood
    Hamilton
  • Cross street
    James Street North & King William
  • Parking details
    Street Parking
  • Public transit
    James Street North & King William
  • Additional
    Bar/Lounge, Beer, Chef's Table, Cocktails, Corkage Fee, Full Bar, Gender Neutral Restroom, Gluten-free Options, Happy Hour, Late Night, Non-Smoking, Patio/Outdoor Dining, Vegan, Weekend Brunch, Wine
Gift card

Gift card

Send gift cards instantly by email or print to present in person.

Send a gift card

Experiences

  • Brunch UnDefined!

    May 1, 2025 - Dec 31, 2025
    Join us for an UnDefined brunch Saturdays & Sundays. UnDefined is know for its ever evolving menus and unique additions. Indulge in some of our favorites as well as a seasonal a la carte offerings to brunch without definition. Reservations highly recommended - No additional costs - Menu offering is a la carte
    Brunch UnDefined! Photo

What 853 people are saying

Undefined reviews from people who’ve dined at this restaurant. Based on recent rating.

Overall ratings and reviews

Reviews can only be made by diners who have eaten at this restaurant

4.7
4.7 based on recent ratings
  • 4.7Food
  • 4.7Service
  • 4.6Ambience
  • 4.4Value

NoiseModerate

Loved For

  • Toronto / Ontario

    Bistro

  • Southern Ontario

    Innovative

Review summary

AI-generated from verified diner reviews
Undefined offers a vibrant dining experience with "amazing brunch" and "delicious food" that keeps guests returning. The creative menu and "wonderful staff" enhance the inviting atmosphere, while standout dishes like the mushroom eggs Benedict and wild boar dumplings receive rave reviews. Though some seating arrangements may not suit all preferences, the overall service is "exceptional."
853 Reviews
  1. ABIR

    Toronto3 reviews

    5.0

    Dined 3 days ago

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    This is by far the best restaurant I have been lately the food was 10/10. Hana our server was amazing also ,professional and always there asking if we needed anything, with friendly smile . The atmosphere is beautiful the ambiance is amazing the food higher end that what we though. It’s honestly worth the try looking forward to going there again. By the way the food presentation was unreal also. Can’t say enough about this place. Price is very reasonable also had mention that. Thanks To my son for recommending this restaurant.

    Is this helpful?

  2. Marlene

    Toronto1 review

    5.0

    Dined 5 days ago

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    Delicious food! And great service. I would recommend this restaurant to any foodee

    Is this helpful?

  3. Brenden

    Toronto2 reviews

    5.0

    Dined 5 days ago

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    Amazing brunch, 10/10, will definitely be coming back for more.

    Is this helpful?

  4. Rene

    Montreal / Quebec1 review

    5.0

    Dined on May 11, 2025

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    We went for brunch and the food was soooo delicious!!! The biscuits were so buttery, the texture was perfect. The menu was also so creative and the flavours worked so well in everything we had. All cooked to perfection and our server was great!

    Is this helpful?

  5. Cindy

    Toronto17 reviews

    4.0

    Dined on May 11, 2025

    1. Overall 4
    2. Food 5
    3. Service 5
    4. Ambience 4
    The food and service was amazing! Such a nice little spot for a fantastic brunch. Our only issue was that our reservation for “bar seating” meant 4 individual stools lined up at the bar! Not the best for a Mother’s Day meal. But acknowledging that it was totally my responsibility to check exactly what “bar seating” meant. I was picturing high-top tables and chairs, versus stools at the bar. My bad. But overall, a great meal with wonderful service staff.

    Is this helpful?

  6. Jenny VIP

    Toronto17 reviews

    4.0

    Dined on May 10, 2025

    1. Overall 4
    2. Food 4
    3. Service 4
    4. Ambience 4
    My husband and I went for a Saturday night dinner at the restaurant . It’s a fun causal place with very good food. The waitstaff were very friendly . We enjoyed our evening.

    Is this helpful?

  7. Julia

    Toronto1 review

    5.0

    Dined on May 10, 2025

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    Wonderful staff, amazing food with a creative menu and great vibes.

    Is this helpful?

  8. Shannon

    Toronto1 review

    5.0

    Dined on May 10, 2025

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    Great experience! loved the food and our server. What a nice way to spend mother's day.

    Is this helpful?

  9. H

    Toronto6 reviews

    3.0

    Dined on May 10, 2025

    1. Overall 3
    2. Food 5
    3. Service 3
    4. Ambience 3
    No one came to check on us once food was delivered. Also I booked a standard table, not a "high top" table. I actually didn't book at other restaurants because they only offer a "high top". I booked here because of a standard table and the menu. The menu was ok. But even though I booked a standard, we got a high top. It was really disappointing. I'll book somewhere else in the future

    Is this helpful?

  10. Caroline

    Detroit / Eastern Michigan8 reviews

    5.0

    Dined on April 26, 2025

    1. Overall 5
    2. Food 5
    3. Service 5
    4. Ambience 5
    A delightfully dining experience. A colorful and lively little space close to public parking that offers unique menu options and a good selection of beers, wines and cocktails. We sampled the beet salad appetizer, salmon & scallop risotto entrees and the sticky toffee pudding, and found every course attractively presented and totally delicious! Grateful thanks to Meg & co. for taking such good care of us - offering such a friendly and professional service.

    Is this helpful?

FAQs

Undefined is rated 4.7 stars by 853 OpenTable diners.

Undefined does offer gift cards which you can purchase here.

Yes, you can generally book this restaurant by choosing the date, time and party size on OpenTable.

  1. Home
  2. Canada
  3. Toronto / Ontario
  4. Southern Ontario
  5. Hamilton

Make a reservation

2 people
7:00 PM
Booked 9 times today
Experiences are available.
Google Map for Undefined

35 King William St, Hamilton, ON L8R 1A1

Dining areas

Additional information

  • Cross street
    James Street North & King William
  • Neighborhood
    Hamilton
  • Hours of operation
    Brunch Sat, Sun 10:00 am–3:00 pm Lunch Wed–Fri 11:30 am–4:00 pm Dinner Daily 4:00 pm–10:00 pm Bar Fri, Sat 10:00 pm–12:00 am
  • Price
    CAN$31 to CAN$50
  • Cuisines
    Bistro, Farm-to-table, Cocktail Bar
  • Dining style
    Casual Elegant
  • Dress code
    Business Casual
  • Parking details
    Street Parking
  • Public transit
    James Street North & King William
  • Payment options
    AMEX, Mastercard, Visa
  • Additional
    Bar/Lounge, Beer, Chef's Table, Cocktails, Corkage Fee, Full Bar, Gender Neutral Restroom, Gluten-free Options, Happy Hour, Late Night, Non-Smoking, Patio/Outdoor Dining, Vegan, Weekend Brunch, Wine
Gift card

Gift card

Send gift cards instantly by email or print to present in person.

Send a gift card
  • Privacy Policy
  • Terms of Use
  • Cookies and Interest-Based Ads
  • Cookie Preferences
Copyright © 2025 OpenTable, Inc. 1 Montgomery St Ste 500, San Francisco CA 94104 - All rights reserved.
OpenTable is part of Booking Holdings, the world leader in online travel and related services.
Booking Logo
Priceline Logo
KAYAK Logo
Agoda Logo
OpenTable Logo