(transitive) To select one from a group and treat differently.

(US) A short-handled sledgehammer used with one hand, with a head weighing 3-4 pounds and two flat faces.

plural of single jack

consisting of a single organism / of or pertaining to a single organism

Used other than figuratively or idiomatically: see single, money. / (obsolete) change, small coins

(computing, telecommunications) Of a operating system, etc., only capable of serving one user at a time, not many users simultaneously.

(computing) Of a operating system, etc., only capable of execution of one task (program or app) at a time, not many tasks simultaneously.

plural of single reed

plural of single-reed

A reed used singly in many wind instruments, which vibrate to produce a sonorous sound.