[once upon a time] {adv. phr.} Sometime before now, long ago. […]

[once-over] {n.}, {slang} 1. A quick look; a swift examination of […]

[one] See: [AT ONE], [FOR ONE], [GO IN ONE EAR AND […]

[one and the same] {adj. phr.} The same; identical. * /Erle […]

[one damn thing after another] or [ODTAA] (pronounced owed-tay) {n. phr.} […]

[one eye on] {informal} Watching or minding (a person or thing) […]

[one foot in the grave] {n. phr.} Near to death. * […]

[one for the books] {n, phr.}, {informal} Very unusual; a remarkable […]

[one man's meat is another man's poison] What is good for […]

[one of these days] or [some of these days] {adv. phr.} […]