foothold (Noun) — An area in hostile territory that has been captured and is held awaiting further troops and supplies. ex. "the only foothold left for British troops in Europe was Gibraltar"
foothold (Noun) — A place providing support for the foot in standing or climbing.
foothold (Noun) — An initial accomplishment that opens the way for further developments. ex. "they are presently attempting to gain a foothold in the Russian market"