Definition of plainly

• unmistakably (`plain is often used informally for `plainly); "the answer is obviously wrong"; "she was in bed and evidently in great pain"; "he was manifestly too important to leave off the guest list"; "it is all patently nonsense"; "she has apparently been living here for some time"; "I thought he owned the property, but apparently not"; "You are plainly wrong"; "he is plain stubborn"
• in a simple manner; without extravagance or embellishment; "she was dressed plainly"; "they lived very simply"