Simple past tense and past participle of overwhelm.(verb)
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Use "overwhelmed" in a sentence
"Daniel Nestor can only come up with the word "overwhelmed" to describe the feeling of having a star with his name on it placed alongside stars for Canadians such as Wayne Gretzky and Michael J. Fox."
"I would really prefer to maintain my optimism, because I think that feeling overwhelmed is rarely helpful."
"And Worldcon's smaller scale means you aren't overwhelmed from the first instant, and can meet people without a completely tactical plan (without cell phones, meeting anyone at CC would be a nightmare, and as it was I missed people I wanted to see or played aisle-tag)."