definition of lao
Definition of LAO. 1. : a member of a Buddhist people living in Laos and adjacent parts of northeastern Thailand. 2. : the Thai language of the Lao people.â Lao adjective. See Lao defined for kids.ADVERTISEMENT.efinition of LAO. 1. : a member of a Buddhist people living in Laos and adjacent parts of northeastern Thailand. 2. : the Thai language of the Lao people. â Lao adjective. See Lao defined for kids. ADVERTISEMENT.