What does "let her down" mean in the song below:

She knows, she knows
That I never let her down before.

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  • and what does "before" means in here? – Rwy5 May 20 '15 at 16:06
  • "Before" means "previously" here. – jlp May 20 '15 at 16:17
  • 1
    Please try to look things up in a dictionary before asking here. Both these words can be easily found in any dictionary. – Janus Bahs Jacquet May 20 '15 at 16:27

Answer: Disappoint

"She knows, she knows That I never [disappointed] her before."

Source: http://idioms.thefreedictionary.com/let+down

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