liveaboard adjective 2noun 2forms 1 adjective2 •Of a boat: designed or modified to allow people to live on board. •Of a person: living on board a boat. noun2 •A person who lives on a boat.This marina is the closest to the ocean and has a surprisingly liberal liveaboard policy (10 percent of the total population; children, pets, okay). — 1978 •A boat designed or modified to allow people to live on board, compared to similar boats which do not have this feature. formsliveaboards