American Dictionary

Define dictionary terms easily in our powerful online English dictionary.

Searching for...

No matching words found

Try a different search term or browse the dictionary

Definition cap in American English

cap noun

[countable] noun
/kæp/
1

a soft hat with a stiff part called a bill or visor that comes out over your eyes

Example

a baseball cap

Synonyms and related words
1.1

a soft hat that people wear as part of a uniform

Example

a nurse's/chauffeur's/sailor's cap

Synonyms and related words
1.2

a soft hat that you wear to protect or cover your hair

Example

a swimming/bathing/shower cap

Synonyms and related words
2

a lid or part that fits over the top of something

Example

Meg screwed the cap back on the bottle.

Synonyms and related words
3

the top part of a mountain

Example

the hills with their snowy caps

Synonyms and related words
3.1

the top part of a wave

Synonyms and related words
3.2

the round top part of a mushroom

Synonyms and related words
4

a limit on the amount of money that you can spend or charge

Example

Airlines began to impose a $50 cap on commissions for domestic flights.

Synonyms and related words
5

a hard cover attached to a tooth to protect it or replace part of it

Synonyms and related words
6

a small amount of explosive that is used to make a loud noise in a toy gun called a cap pistol

Synonyms and related words
Definition cap in American English