Entry 1 sense Webster, 1913 Alliterative /əl-ĭt'-ẽr-ət-ĭv/ · Al·lit·er·a·tive · IPA /əlˈɪtərətɪv/ 01 a. Pertaining to, or characterized by, alliteration; as, alliterative poetry. 1. Pertaining to, or characterized by, alliteration; as, alliterative poetry.