span - definition and synonyms

noun [countable] [usually singular] 

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  1. 1
    the amount of time that something lasts

    Nearly 100 witnesses testified over a span of 20 days.

    attention/concentration span (=the period for which you can pay attention/concentrate):

    Kids these days have a very limited attention span.

    See also lifespan
  2. 2
    the width of something

    With a span of one mile, it’s the region’s longest bridge.

    The spider has a 3-inch leg span.

     Synonyms and related words
  3. 3
    the differences included in something that you are considering or calculating