Definition of "underbilled" [underbilled]

• Simple past tense and past participle of underbill. (verb)

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• "The company said it was restating its results after discovering it had underbilled customers for 15 months."
• "Concerned that her pal's advance would be unduly depleted, she underbilled the time she devoted to the manuscript."
• "They were majorly underbilled and I'm supposed to check out what happened."