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commutate to reverse the direction of (alternating current) to create direct current.
commutation a substitution of a milder for a more severe criminal sentence. [3 definitions]
commutation ticket a ticket for a specified number of trips to and from the same destinations that is issued, at a reduced rate, to commuters, esp. for railroad or toll road travel.
commutative of or pertaining to substitution or exchange. [2 definitions]
commutator a device for changing the direction of an electric current.
commute to reduce the severity of (a prison sentence). [7 definitions]
commuter one who travels regularly between two points, usu. home and workplace.
comorbid of or pertaining to co-existing medical conditions in a patient.
comorbidity the presence of co-exisiting medical conditions in a patient.
Comoro Islands a group of islands between the coast of northern Mozambique and northern Madagascar. (See Comoros.)
Comoros an African country comprising three of the Comoro Islands; Federal and Islamic Republic of Comoros.
comp1 to play an accompaniment to jazz music, as on a piano or guitar, often of syncopated chords.
comp2 (informal) a comprehensive examination, as at the end of an academic year, covering all work included in a course during that period of time.
comp. abbreviation of "compensation." [3 definitions]
compact1 solidly joined or packed together; dense. [9 definitions]
compact2 an agreement or contract; pact.
compact cassette a type of magnetic-tape cartridge, first released in 1963, that is used for audio recording and playback.
compact disk a palm-sized disk on which music, data, or the like has been digitally encoded, that is read by laser and transmitted to a playback device.
compactor a machine that compresses or grinds up trash for easy disposal.
compadre a close friend, companion, or partner; buddy.
companion one who associates with another or others. [3 definitions]