keep one's word

keep (one's) word

To do as one has promised. Tom always keeps his word, so if he promised to help you move, then he'll be here.See also: keep, word

keep one's word

Honor one's promises, as in You can count on Richard; he'll keep his word. This expression employs word in the sense of "a promise," a usage dating from the late 1500s. For an antonym, see go back on. See also: keep, word