Longman Dictionary of Contemporary English homepage

Date: 1600-1700
Language: Latin
Origin: , past participle of asserere, from ad- 'to' + serere 'to join'

assert

verb
     
as‧sert [transitive]
1 to state firmly that something is true:
French cooking, she asserted, is the best in the world.
assert that
He asserted that nuclear power was a safe and non-polluting energy source.
2

assert your rights/independence/superiority etc

to state very strongly your right to something:
Native Americans asserting their rights to ancestral land
3

assert yourself

to behave in a determined way and say clearly what you think:
Women began to assert themselves politically.
4

assert itself

if an idea or belief asserts itself, it begins to influence something:
National pride began to assert itself.

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