Entry 1 sense Webster, 1913 Boation /bō.āʹshən/ · Bo·a·tion · IPA /bəʊˈeɪʃən/ 01 n. A crying out; a roaring; a bellowing; reverberation. 1. A crying out; a roaring; a bellowing; reverberation.[Obs.] “The guns were heard . . . about a hundred Italian miles, in long boations.” — Derham.