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b-day

American  
[bee-dey] / ˈbiˌdeɪ /
Or b'day

noun

Informal.
  1. birthday.

    When's her b-day?


Usage

What does b-day mean? B-day is an informal shortening of birthday, as in We’re surprising Rami with a cake for his b-day tomorrow. B-day is normally used in very informal situations, such as texting and social media posts, especially with friends and family rather than with strangers or acquaintances. B-day is also written as b’day. It’s also occasionally written as b day or beeday. Example: Jenny invited me to her b-day party at that fancy restaurant, and I can’t wait!

Etymology

Origin of b-day

By shortening

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

You know this family to be so committed to not observing the pandemic safety practices that they even booked a b-day party at a venue where the staff won’t follow CDC guidelines.

From Slate • May 7, 2021

Happy b-day: Los Angeles turned 235 on Sept. 4.

From Los Angeles Times • Sep. 6, 2016

And a happy 11th b-day to your hair.

From US News • Jun. 14, 2016

“It’s your 35th b-day today,” the handwritten message says.

From New York Times • Sep. 10, 2014

“Oh, I’m sorry to hear that. I was hoping to do an early b-day celebration with her and spend some quality time together,” Maxine says.

From "Piecing Me Together" by Renée Watson

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