ENGLISH
REFERENCE

workout

n.
US //ˈwɝˌkaʊt// UK //wˈɜːkaʊt// work·out
  1. 1 strenuous activity (n.)
    C1 Advanced Informal

    any activity that is very tiring or requires a lot of mental or physical effort.

    any task or experience that demands significant physical or cognitive exertion, often resulting in fatigue.

    Example

    Moving all that heavy furniture gave me a real workout.

    Example

    The three-hour technical interview was a mental workout that left the candidate feeling completely drained by the end of the afternoon.
Origin

Deverbal from work out.

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