concomitant

Etymology

First attested 1607; from Middle French concomitant, from Latin concomitāns, the present participle of concomitor (“I accompany”), from con- (“together”) + comitor (“I accompany”), from comes (“companion”).

adj

1. Accompanying; conjoining; attending; concurrent.
   It has therefore pleased our wise Creator to annex to several objects, and to the ideas which we receive from them, as also to several of our thoughts, a concomitant pleasure, […] 1689, John Locke, An Essay Concerning Human Understanding
   The visitors saw the measures taken immediately before, during, and after an "air raid", which included a gas and high-explosive bomb attack. The concomitant noise "effects" sounded grimly realistic. 1939 June, “What the Railways are Doing: London Transport Air Raid Precautions”, in Railway Magazine, page 462
   The new technology on which super-industrialism is based, much of it blue-printed in American research laboratories, brings with it an inevitable acceleration of change in society and a concomitant speed-up of the pace of individual life as well. 1970, Alvin Toffler, Future Shock: Bantam Books, page 41
   With technological improvement, therefore, it will become possible, in a succession of steady states, to have a larger and larger amount of capital equipment available to each representative worker in the economy, with a concomitant rise in productivity. 2005, Alpha Chiang, Kevin Wainwright, Fundamental Methods of Mathematical Economics, 4th edition, McGraw-Hill International, page 501
2. (grammar) Of or relating to the grammatical aspect which expresses that a secondary action is occurring simultaneously to the primary action of the statement.

noun

1. Something happening or existing at the same time.
   It is also instructive to consider the relation of these dreams to anxiety dreams. In the dreams we have been discussing, a repressed wish has found a means of evading censorship—and the distortion which censorship involves. The invariable concomitant is that painful feelings are experienced in the dream. 1900, Sigmund Freud, translated by James Strachey, The Interpretation of Dreams, Avon Books, page 301
   A major concomitant of the advent of diesel traction has been a vast increase in the amount of electrical equipment needing overhaul. 1963 May, “Metamorphosis at Swindon Works”, in Modern Railways, page 337
   The declining commitment to place is thus related not to mobility per se, but to a concomitant of mobility- the shorter duration of place relationships. 1970, Alvin Toffler, Future Shock, Bantam Books, page 93
2. (algebra) An invariant homogeneous polynomial in the coefficients of a form, a covariant variable, and a contravariant variable.