From WordNet (r) 2.0 (August 2003) [wn]:
Lao
adj : of or relating to a member of the Buddhist people inhabiting
the Mekong river in Laos and Thailand [syn: Lao]
n 1: a member of a Buddhist people inhabiting the area of the
Mekong River in Laos and Thailand and speaking the Lao
language; related to the Thais [syn: Lao, Laotian]
2: the Tai language of a Buddhist people living in the area of
the Mekong River in Thailand and Laos [syn: Lao]