/span"euhr/ , n.
1. a person or thing that spans.
2. Also called spanner wrench . a wrench having a curved head with a hook or pin at one end for engaging notches or holes in collars, certain kinds of nuts, etc. Cf. pin wrench .
3. Chiefly Brit. a wrench, esp. one with fixed jaws.
[ 1630-40; SPAN 1 + -ER 1 ]