(transitive) To encounter, discover; to come upon. / (intransitive) To appear on a stage or in a performance.

Come along with me; join me in going. / An expression of encouragement. / An expression of disbelief. / An expression of frustration, exasperation, or impatience; hurry up.

An invitation to someone in the upper part of a building to come downstairs. / An invitation to someone living to the north to come for a visit.

(physics) The observation that the sums and differences of the frequencies of spectral lines often equal other observed frequencies; a consequence of quantum mechanics.

(Christianity) The Holy Spirit, the Holy Ghost.

A person who comforts someone who is suffering. / (US) A padded cover for a bed, duvet, continental quilt. / (dated, chiefly UK) A woollen scarf for winter. / (UK, New Zealand, Australia) A pacifier.

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.