(UK, slang) Great, cool, awesome, respectable; a term of approbation, often as interjection.
(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.
(programming) Of a programming language, type-safe or more generally offering well-defined behavior despite programming errors.
(slang) Lenient, usually describing a teacher that is easy-going.
(snooker, of an object ball) In a location that renders it difficult to hit with the cue ball.
(used after a noun, often forming a compound) Not susceptible to a specified source of harm.
Cautious.
Free from risk.
Not in danger; out of harm's reach.
Properly secured.
Providing protection from danger; providing shelter.
Reliable; trusty.
noun
(dated) A ventilated or refrigerated chest or closet for securing provisions from noxious animals or insects.
(dated, colloquial) A safety bicycle.
(slang) A condom.
A box, usually made of metal, in which valuables can be locked for safekeeping.