(military) Any call sign which represents two or more facilities, commands, authorities, or units. The collective call sign for any of these includes the commander thereof and all subordinate commanders therein.

(Britain, finance) A way of investing money with other people to participate in a wider range of investments than may be feasible for an individual investor, and to share the costs of doing so.

Alternative form of collect one's thoughts

(idiomatic) To become mentally composed, especially after being distressed, surprised, or disoriented; to become calm or organized in one's emotional state or thinking, as in preparation for a conversation, speech, decision, etc.

plural of collective investment scheme

(idiomatic) To request and receive money or goods of value from members of a group, especially for a charitable purpose.

plural of collect-'em-up

(video games) A video game based around collecting items.

plural of collective call sign

(informal, entomology) Formica archboldi, a kind of ant that hunts trap jaw ants and takes their decapitated heads back to its nest.