English

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Etymology 1

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From head +‎ -ful.

Noun

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headful (plural headfuls or headsful)

  1. An amount of information, emotion, etc. present in the mind.
    • 1994, National Storytelling Association (U.S.), Sheila Dailey, Tales as tools: the power of story in the classroom (page 15)
      The headful of stories you gather over a lifetime lets you refold the time and space of your history into meaningful, tellable patterns.

Etymology 2

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From head +‎ -ful.

Adjective

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headful (not comparable)

  1. (genetics) That fills the head of a phage