afterthought

/ˈæftərˌθɔt/
noun
  1. An idea, thought, or thing that comes later, often as an addition or after the main part is done.
    • The dessert was an afterthought; the main meal was the focus.
    • He added a few notes as an afterthought at the end of the letter.
    • The garden was designed first, and the patio was just an afterthought.
  2. Something or someone that is not given enough attention or importance, treated as secondary.
    • Don't treat your health as an afterthought; make it a priority.
    • In the busy office, the interns often felt like an afterthought.
    • Safety features were an afterthought in the original building design.
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