The meaning of SUSPICIOUS is tending to arouse suspicion : questionable. How to use suspicious in a sentence.

His new book bears a suspicious resemblance to a book written by someone else. (= His book is so similar to the other book that it seems as if he has copied it.)

Definition of suspicious adjective from the Oxford Advanced Learner's Dictionary. suspicious (of/about somebody/something) feeling that somebody has done something wrong, illegal or dishonest, …

If you describe someone or something as suspicious, you mean that there is some aspect of them which makes you think that they are involved in a crime or a dishonest activity.

Define suspicious. suspicious synonyms, suspicious pronunciation, suspicious translation, English dictionary definition of suspicious. adj. 1. Arousing or apt to arouse suspicion; questionable: …

Oct 26, 2025 · From Old French sospecious, from Latin suspiciosus, suspitiosus. suspicious (comparative more suspicious, superlative most suspicious) His suspicious behaviour brought him to …

sus•pi•cious (sə spish′ əs), adj. tending to cause or excite suspicion; questionable: suspicious behavior. inclined to suspect, esp. inclined to suspect evil; distrustful: a suspicious tyrant. full of or feeling …

SUSPICIOUS definition: tending to cause or excite suspicion; questionable. See examples of suspicious used in a sentence.

We were instructed to report any suspicious activity/behavior in the neighborhood. The suspicious vehicle was reported to police. He died under suspicious circumstances. [=under circumstances that …

Definitions of suspicious adjective openly distrustful and unwilling to confide synonyms: leery, mistrustful, untrusting, wary