Meaning of ASSERTION in English

ASSERTION

as ‧ ser ‧ tion /əˈsɜːʃ ə n $ -ɜːr-/ BrE AmE noun [countable]

something that you say or write that you strongly believe

assertion that

the assertion that house prices are falling

assertion of

her assertion of independence

assertion about

her assertions about the murder of her father

She makes very general assertions about marriage in the poem.

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THESAURUS

▪ claim a statement that something is true, even though it has not been proved:

It is difficult to believe some of the manufacturer's claims for its products.

▪ allegation a statement that someone has done something wrong or illegal, but that has not been proved:

He has strongly denied the allegations of sexual harassment.

▪ assertion formal something that you say or write that you strongly believe:

the assertion that house prices are falling

▪ contention formal a strong opinion that someone expresses:

Her main contention is that doctors should do more to encourage healthy eating.

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.