| Noun | 1. | Laos - a mountainous landlocked communist state in southeastern Asia; achieved independence from France in 1949Mekong, Mekong River - an Asian river; flows through a large delta in southern Vietnam into the South China Sea Lao, Laotian - 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 | |