6 days ago · The meaning of MYSTERIOUS is of, relating to, or constituting mystery. How to use mysterious in a sentence. MYSTERIOUS definition: full of, characterized by, or involving mystery. See examples of mysterious used in a sentence. The costume is mysterious in its poverty as well as in its flair for incoherent details. involving or full of mystery: a mysterious phone call. suggesting or implying a mystery: a mysterious smile. puzzling; inexplicable: a mysterious inscription on an ancient tomb. Definition of mysterious adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. Someone or something that is mysterious is strange and is not known about or understood. He died in mysterious circumstances. A mysterious illness confined him to bed for over a month. The whole … Apr 5, 2026 · Adjective mysterious (comparative more mysterious, superlative most mysterious) Of unknown origin. Synonym: untraceable He received a mysterious phone call this morning.
