Advance, make progress; also, win acceptance. For example, The new conservation policy is gaining ground among the voters. This expression alludes to a military advance in which an army literally takes territory from the enemy. Its figurative use dates from about 1800. For an antonym, see LOSE GROUND. 1. gain ground on or upon. Encroach on, advance at the expense of. For example, Door-to-door canvassing helped them gain ground on the opposition. 2.
American Heritage Idioms
Phrase(s): gain ground
to make progress; to advance; to become more important or popular. • Our new product is gaining ground against that of our competitor. • Since the government announced its new policies, the opposition has been gaining ground.
McGrawhill's American Idioms And Phrasal Verbs