Added 9 October 2026 inclosure noun Categories: LanguageActionsRare Words noun ! Definition from WordNet 3.1, Princeton University. More about inclosure at Wordnik → Where our words come from → Something (usually a supporting document) that is enclosed in an envelope with a covering letter. The act of enclosing something inside something else. Related Words: enclosingenclosureenvelopmentenvelopinginclosedinclosinginclosesincloseassartintrenchmentenclosuresstockade Back to today's word