nest egg

/ˌnɛst ˈɛg/

Other forms: nest eggs

Money that you save for the future is a nest egg. Your parents might be saving their nest egg so they can move to Mexico when they retire.

A nest egg is usually a retirement account, a fund you add to regularly so your savings grows every year. You can really describe any cache of saved money as a nest egg — even a piggy bank, growing gradually more full of dimes, is a nest egg of sorts. The term has been around since about 1700, meaning "retirement savings." It comes from the practice of leaving a real or fake egg in a nest to encourage hens to lay.

Definitions of nest egg
  1. noun
    a fund of money put by as a reserve
    synonyms: savings
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    type of:
    fund, monetary fund
    a reserve of money set aside for some purpose
  2. noun
    device consisting of an artificial egg left in a nest to induce hens to lay their eggs in it
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    type of:
    an instrumentality invented for a particular purpose
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