Added 7 October 2026 lav /læv/ noun Categories: ThingsRare Words noun ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about lav at Wordnik → Where our words come from → A room or building equipped with one or more toilets. Related Words: bathroomtoiletlavatoryjohnprivyfacilitycanvehiclevalvldloowashroom Back to today's word