A box, usually made of metal, in which valuables can be locked for safekeeping.

(slang) A condom.

(transitive) To make something safe.

Not in danger; out of harm's reach.

Free from risk.

Providing protection from danger; providing shelter.

(baseball) When a batter successfully reaches first base, or when a baserunner successfully advances to the next base or returns to the base he last occupied; not out.

(snooker, of an object ball) In a location that renders it difficult to hit with the cue ball.

Properly secured.

(used after a noun, often forming a compound) Not susceptible to a specified source of harm.

(UK, slang) Great, cool, awesome, respectable; a term of approbation, often as interjection.

(slang) Lenient, usually describing a teacher that is easy-going.

Reliable; trusty.

Cautious.

(programming) Of a programming language, type-safe or more generally offering well-defined behavior despite programming errors.