I forgot to renew my licence and now it is invalid.
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If the check is invalid, then the debt has not been settled. The
money is still owed to you and you can collect it in another
form.
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.invalid was created in 1999.
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The word invalid is an adjective. It describes something that is
not valid.
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An example of a homograph for the word "invalid" is: "She received an invalid excuse from her brother." In this sentence, "invalid" is pronounced with the stress on the second syllable.