To 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.
To 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.
To thin out.
(of a horse) To take the irregular gait called singlefoot.
To sequester; to withdraw; to retire.
To take alone, or one by one.