- any of the thin, narrow strips of wood used in lattices or nailed to two-by-fours, rafters, etc. as a foundation for plaster, tiles, etc.
- any foundation for plaster, as wire screening or expanded metal
- laths collectively, esp. when used as a base for plaster
Origin of lathMiddle English lathe ( from Old English an unverified form læthth, akin to Old High German latta) and latte ( from Old English lætt, akin to Old Norse latto)