a military unit that is a subdivision of a company; usually has a headquarters and two or more squads; usually commanded by a lieutenant
"The new lieutenant took command of the platoon as they began their morning patrol."
a team of policemen working under the military platoon system
"The new recruits were assigned to a tactical platoon where they learned police procedures alongside basic combat training."
a group of persons who are engaged in a common activity
"platoons of tourists poured out of the busses"
"the defensive platoon of the football team"
A unit of thirty to forty soldiers typically commanded by a lieutenant and forming part of a company.
"The new recruit was assigned to the third platoon under Lieutenant Harris after completing basic training."
To alternate starts with a teammate of opposite handedness, depending on the handedness of the opposing pitcher
"The manager decided to platoon the right-handed batter against the lefty starter and bring in his left-hander when the opponent switched pitchers."