spanner (plural spanners)
- (Australian, NZ, British, Irish) A hand tool for adjusting nuts and bolts; a wrench.
- Pass me that spanner, Jake; there's just one more nut to screw in.
- (rare) One who, or that which, spans.
- (weaponry) A hand tool shaped like a small crank handle, for winding the spring of a wheel lock on a musket.
- (obsolete) A device in early steam engines for moving the valves for the alternate admission and shutting off of the steam.
- (UK) A problem, dilemma or obstacle; something unexpected or troublesome (in the phrase spanner in the works)
- (British, Irish, mildly, derogatory) A stupid or unintelligent person; one prone to making mistakes, especially in language.
- (hand tool for nuts and bolts) wrench (US)
- French: clef à écrous, clef / clé, serre-écrou, clé de serrage
- German: Schraubenschlüssel, Schlüssel
- Italian: chiave
- Portuguese: chave
- Russian: га́ечный клю́ч
- Spanish: llave