assertion noun - Definition, pictures, pronunciation and usage notes . . . Definition of assertion noun from the Oxford Advanced Learner's Dictionary [countable] a statement saying that you strongly believe something to be true synonym claim He was correct in his assertion that the minister had been lying Do you have any evidence to support your assertions?
assertion - WordReference. com Dictionary of English as•ser•tion (ə sûr′ shən), n a positive statement or declaration, often without support or reason: a mere assertion; an unwarranted assertion an act of asserting