Meaning of “of” - Learner’s Dictionary

of

preposition uk us strong /ɒv/ weak /əv/
BELONG

A1 belonging or relating to someone or something:

a friend of mine
the colour of her hair
part of the problem
AMOUNT

A1 used after words that show an amount:

both of us
NUMBER

A1 used with numbers, ages, and dates:

a boy of six
a decrease of 10%
the 14th of February 2012
CONTAIN
MADE

made or consisting of:

ADJECTIVE/VERB
SHOW

A2 showing someone or something:

a map of the city
CAUSE

B1 showing a reason or cause:

He died of a heart attack.
POSITION

A2 showing position or direction:

the front of the queue
a small town north of Seattle
ACTION/FEELING

used after nouns describing actions or feelings to mean 'done to' or 'experienced by':

the suffering of millions
WRITTEN

B1 written or made by:

the collected works of William Shakespeare

(Definition of “of” from the Cambridge Learner’s Dictionary © Cambridge University Press)

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