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

His colleagues became suspicious (= thought that there was something wrong) when he did not appear at work, since he was always punctual. They are deeply / highly (= very) suspicious of …

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 …

1. tending to cause or excite suspicion; questionable: suspicious behavior. 2. inclined to suspect, esp. inclined to suspect evil; distrustful. 3. full of or feeling suspicion. 4. expressing or …

If you are suspicious of someone or something, you believe that they are probably involved in a crime or some dishonest activity.

Find 587 different ways to say SUSPICIOUS, along with antonyms, related words, and example sentences at Thesaurus.com.

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 …

What does suspicious mean? To be suspicious is to have a suspicion about someone or something, especially to have a feeling of distrust about the person or thing.

She became suspicious of his behavior. The dog is suspicious of strangers. [=the dog does not trust strangers] We noticed the suspicious stare of the security guard.

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