[side street] {n.} A street that runs into and ends at […]

[sidekick] {n.} A companion; a close friend of lesser status. * […]

[sight for sore eyes] {n. phr.}, {informal} A welcome sight. * […]

[sign of the times] {n. phr.} A characteristic of the times […]

[silent majority] {n.}, {informal} The large majority of people who, unlike […]

[silver anniversary] or [wedding] {n. phr.} The twenty-fifth wedding anniversary of […]

[Simon Legree] {n.}, {informal} A strict person, especially a boss, who […]

[sit-up] {n.} A vigorous exercise in which the abdominal muscles are […]

[six bits] {n.}, {slang} Seventy-five cents. * /"Lend me six bits […]

[six of one and half-a-dozen of the other] {n. phr.} Two […]