Definitions
1.verbTo identify or select one member of a group from the others; generally used with out, either to single out or to single (something) out."Eddie singled out his favorite marble from the bag."
2.verbTo get a hit that advances the batter exactly one base."Pedro singled in the bottom of the eighth inning, which, if converted to a run, would put the team back into contention."
3.verbTo thin out.
4.verb(of a horse) To take the irregular gait called singlefoot.
5.verbTo sequester; to withdraw; to retire.
6.verbTo take alone, or one by one.