Idiom: On One's KneesCheck definitions of...ononeskneesMeaningsUsed other than figuratively or idiomatically: see on, one, knee.On the verge of collapse; at the mercy of someone.A-Z Proximitieson its meritson one's billon one's deathbedon one's feeton one's high horse on one's knees on one's last legson one's lonesomeon one's ownon one's todon one's toesSimilar Idiomsbring to one's kneeson one's kneesthe bee's knees