autodefenestration UK /ˌɔː.təʊ.dɪˌfɛ.nɪˈstɹeɪ.ʃ(ə)n/US /ˌɑː.toʊˌdiː.fɛ.nəˈstɹeɪ.ʃən/ noun1 •(rare) The act of hurling oneself from a window, especially lethally.She climbs out on a window ledge and threatens autodefenestration if the marriage isn't contracted, and is soon joined on the ledge by Jill. — 1986
