Simple past tense and past participle of outgas.(verb)
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Use "outgassed" in a sentence
"Those "costly programs" are the same ones that resulted in thousands of people being cooped up in improperly prepared trailers that "outgassed" formaldehyde fumes, and that government "inability" has doomed at least a hundred thousand people to long-term exile from their homes."
"If the outgassed vapor tests negative, he's a demon."
"I'd buy mine for a reasonable price, if they tested it, I'm pretty much convinced that is has outgassed by now .."