Troop/truːp/ Definition 1 of 3Pro Tip 1/3Military Context Use 'troop' when discussing military matters, especially regarding multiple soldiers as a unit. The general praised the troop for their bravery. Pro Tip 2/3Performance Groups 'Troop' also refers to a collective of performers, like in dance or theater. A new troop is bringing Shakespeare's plays to life. Pro Tip 3/3Not Always Formal Although commonly military or professional, 'troop' can refer to any organized group. A troop of volunteers assembled to clean the park.