[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 safe side] {adv. phr.} Provided for against a possible […]

[on the side] {adv. phr.}, {informal} 1. In addition to a […]

[on the sly] {adv. phr.} So that other people won't know; […]

[on the spur of the moment] {adv. phr.} On a sudden […]