Afterthought Definition

ăftər-thôt
noun
An idea, response, or explanation that occurs to one after an event or decision.
American Heritage
An idea, explanation, part, etc. coming or added later.
Webster's New World
A thought coming too late, after the occasion for which it was apt.
Webster's New World

A reflection after an act; a later or subsequent thought, action, or expedient.

She packed her sandals only as an afterthought, but she was glad she did.
Wiktionary

Something additional to the original plan or concept.

This whole remodeling was an afterthought, we were only going to paint and call it good.
Wiktionary
Antonyms:
verb
(very rare except in the past tense, possibly nonstandard) To expound as an afterthought.
Wiktionary

Other Word Forms of Afterthought

Noun

Singular:
afterthought
Plural:
afterthoughts

Origin of Afterthought

  • after- +‎ thought

    From Wiktionary

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