Combustion without an external source of heat.

(idiomatic) People will be dealt with in the order they arrive.

Alternative spelling of first-come-first-served

(US, medicine) A product composed of two or more regulated components, i.e., drug/device, biologic/device, drug/biologic, or drug/device/biologic, that are physically, chemically, or otherwise combined as a single entity.

(idiomatic) To make a complete change or reform. / (idiomatic) To complete a cycle of transition, returning to where one started after gaining experience or exploring other things.

A member of a Native American ethnic group residing especially in Texas and Oklahoma. / (plural only "Comanches") A light single-engine aircraft, the Piper PA-24 Comanche.

Of or pertaining to the Comanche people, culture, or language.

The nation of these people. / The Uto-Aztecan language spoken by these people, sometimes classified as a variety of Shoshone. / An unincorporated community in Yellowstone County, Montana, United States.

A flat comb used to brush down a horse.

present participle of come across