side effect

An unintended consequence, or secondary result, of any action, in addition to the main or intended consequence of that action.

Noun

  1. An unintended consequence, or secondary result, of any action, in addition to the main or intended consequence of that action.
    • The processing of certain raw materials - pulp and paper, oil, and alumina, for example - can have substantial environmental side effects. - 1987, Brundtland Report:
    • A side effect of this architecture (which was designed only for efficient fabrication) is that it also performs automated repair. - 1980, Advanced Automation for Space Missions:
    • So you go along for a long time / And nothing seems to worry your mind / But what it adds up to / It's the side effect / That finally gets to you / It's the side effect / That finally gets to you - 1983, Ashford &...

    Synonyms: by-product

    Coordinate Terms: aftereffect aftermath

    1. (medicine) An unintended consequence of a drug or therapy; usually an adverse effect, and not a beneficial one.

      • “While all pharmaceutical treatments have side effects, racism is not a known side effect of any Sanofi medication.” - 2018 May 30, Christine Hauser, quoting Sanofi, “Roseanne Barr’s Ambien Defense Is Disputed: ‘Racism...

      Synonyms: by-product

      Coordinate Terms: aftereffect aftermath

    2. (programming) A change a in state outside of the local environment of the function being called.

      • The Eiffel programming language is somewhat purist in insisting that functions have no side effects.

      Synonyms: by-product

      Coordinate Terms: aftereffect aftermath

Forms

side effects side-effect

Derived

side-effect side-effect-free side-effecting