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What does "act on" mean?

  1. Also, act upon. Conduct oneself in accordance with or as a result of information or another action, as in I will act on my lawyer's advice, or The manager refused to act upon the hotel guest's complaints. [c. 1800]
  2. Influence or affect, as in The baby's fussing acted on the sitter's nerves. [c. 1800]

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