Definition of third cousin in English:

third cousin

  • A child of one’s parent’s second cousin.
    More example sentences
    • Actually they comprised four families of second and third cousins.
    • I think she was some sort of cousin, a second or third cousin, maybe.
    • Often second or third cousins become ‘brothers’ or ‘sisters.’
See parent entry: cousin

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