Definition of Adult
Quick Meaning of Adult
A person who is grown up and has reached the age when the law says they are responsible.
Detailed Definition of Adult
A person who is fully grown and legally responsible, usually 18 years or older.
How to Pronounce Adult
Stress pattern: Oo (2-syllable word).
Tip: Stress on first syllable: AD-ult. The vowel is like 'at' not like 'oo'.
Watch out: Sometimes pronounced with stress on second syllable; should be on the first.
Origin and Etymology of Adult
From Latin "adultus" — grown up.
How to Use Adult in a Sentence
Each example shows “adult” with a CEFR level so learners can pick examples that match their fluency.
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“An adult must supervise children in the pool.”
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“She became an adult when she turned eighteen.”
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“Adult education programs offer skills training for working professionals.”
Synonyms and Antonyms of Adult
Common Synonyms for Adult
Smart Synonyms for Adult — When to Use Each
- elder
- when referring to an older experienced person
- senior
- when emphasizing someone in a higher position
- person
- for general neutral reference to a grown individual
Antonyms of Adult
Common Collocations with Adult
These phrases pair with “adult” in everyday English:
- adult education
- adult supervision
- adult ticket
- young adult
- become an adult
Common Mistakes When Using Adult
Even fluent speakers slip up with “adult”. Here’s how to avoid the most common errors:
- ✗ Wrong: Two adults and three children was in the room.
- ✓ Correct: Two adults and three children were in the room.
- Why: Plural subjects need plural verb form 'were', not 'was'.
- ✗ Wrong: Only adults is allowed in this area.
- ✓ Correct: Only adults are allowed in this area.
- Why: The plural noun 'adults' requires the plural verb 'are'.
Other Forms of Adult
Frequently Asked Questions About Adult
What is the meaning of "Adult"?
A person who is grown up and has reached the age when the law says they are responsible.
How do you pronounce "Adult"?
The IPA is /ˈædʌlt/. Stress on first syllable: AD-ult. The vowel is like 'at' not like 'oo'.
What part of speech is "Adult"?
"Adult" is a noun at A2 level (Common European Framework).
What are synonyms for "Adult"?
Common synonyms include elder, senior, person.
How do you use "Adult" in a sentence?
For example: "An adult must supervise children in the pool."