Definition of Birthday
Quick Meaning of Birthday
The day each year when you celebrate being born.
Detailed Definition of Birthday
The anniversary of the day on which a person was born, usually celebrated annually.
How to Pronounce Birthday
Stress pattern: Oo (2-syllable word).
Tip: Primary stress is on the first syllable: BURTH-day. The vowel in 'birth' is long /ɜː/; the vowel in 'day' is /eɪ/.
Watch out: Learners may stress both syllables equally or place stress on 'day'; the stress must be on 'birth'.
Origin and Etymology of Birthday
Compound of 'birth' and 'day'; birthday observance became common in medieval times.
How to Use Birthday in a Sentence
Each example shows “birthday” with a CEFR level so learners can pick examples that match their fluency.
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“My sister's birthday is next Friday, so we are planning a party.”
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“Children often receive presents and eat cake on their birthday.”
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“His 30th birthday celebration included family members from three different countries.”
Synonyms and Antonyms of Birthday
Common Synonyms for Birthday
Smart Synonyms for Birthday — When to Use Each
- birth anniversary
- when using formal or legal terminology for record-keeping
- natal day
- when emphasizing poetic or religious significance of birth
Common Collocations with Birthday
These phrases pair with “birthday” in everyday English:
- happy birthday
- birthday cake
- birthday party
- birthday gift
- on someone's birthday
Common Mistakes When Using Birthday
Even fluent speakers slip up with “birthday”. Here’s how to avoid the most common errors:
- ✗ Wrong: I will celebrate my birthday in next month.
- ✓ Correct: I will celebrate my birthday next month.
- Why: Preposition error: use 'next month' without 'in' for time references.
- ✗ Wrong: She gave me a birthday present on her birthday.
- ✓ Correct: She gave me a birthday present on my birthday.
- Why: Possessive error: the present is given on the recipient's birthday, not the giver's.
Other Forms of Birthday
Frequently Asked Questions About Birthday
What is the meaning of "Birthday"?
The day each year when you celebrate being born.
How do you pronounce "Birthday"?
The IPA is /ˈbɜːrθdeɪ/. Primary stress is on the first syllable: BURTH-day. The vowel in 'birth' is long /ɜː/; the vowel in 'day' is /eɪ/.
What part of speech is "Birthday"?
"Birthday" is a noun at A1 level (Common European Framework).
What are synonyms for "Birthday"?
Common synonyms include birth anniversary, natal day, birth day.
How do you use "Birthday" in a sentence?
For example: "My sister's birthday is next Friday, so we are planning a party."