Definition of no-brainer in English:

no-brainer

Line breaks: no-brainer

noun

North American informal
  • Something that requires or involves little or no mental effort: the enormous popularity of his TV show makes the book a no-brainer for him
    More example sentences
    • The exams now consist disproportionately of no-brainers like: ‘When you were in school, were you a member of a sports team?’
    • Counting these no-brainers as evidence of genius is absurd.
    • This is a no-brainer, but one of the biggest mistakes hikers make is not realizing the total length of the hikes they are on.

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Pronunciation: ˌastrə(ʊ)ˈgeɪʃ(ə)n
noun
(in science fiction) navigation in outer space