[on the fly] (1) {adv. phr.} 1. While in the air; […]

[on the hour] {adv. phr.} Each time the hour has zero […]

[on the lam] {adj.} or {adv. phr.}, {slang} Running away, especially […]

[on the move] {adj.} or {adv. phr.} 1. Moving around from […]

[on the nose] {adv. phr.}, {informal} Just right; exactly. * /Stanley […]

[on the other hand] {adv. phr.} Looking at the other side; […]

[on the Q.T.] {adv. phr.}, {informal} Secretly; without anyone's knowing. * […]

[on the road] {adv.} or {adj. phr.} 1. Traveling; moving from […]

[on the ropes] {adv.} or {adj. phr.} 1. Against the ropes […]

[on the run] {adv.} or {adj. phr.} 1. In a hurry; […]