post chaise /ˈpəʊstʃeɪz/noun 1post-chaise verb 1forms 4 noun1 •(historical) An enclosed horse-drawn carriage with four wheels, used to transport mail and passengers.She had lately remitted the trespass of a stage-coachman, who had overturned her post-chaise into a ditch — 1749 post-chaise verb1 •To travel in a post-chaise."Conceive, then, the state he will be in after post-chaising for twenty-five miles at a gallop." — 1936 formspost-chaising · post-chaised · post chaises · post-chaises