plussed adjective3 •(informal) Calm, collected and unconfused; not nonplussed (“bewildered, unsure how to react”).Jady was rarely nonplussed, normally being very plussed indeed, but Alison's ability to move events without really noticing astounded him. She ran her hair idly through her fingers. — 2000 •(informal) Bothered, fazed, vexed, or concerned; not nonplussed (“unfazed, unaffected, unimpressed”).I have received so much contradictory advice that I am quite plussed [sic] but I am inclined to think that that given to me by Mr. the American Ambassador […] — 1970 •(informal) Containing a plus sign.
