Simple Definition of suspicious
: causing a feeling that something is wrong or that someone is behaving wrongly : causing suspicion
: having or showing a feeling that something is wrong or that someone is behaving wrongly : feeling or showing suspicion
Examples of suspicious
We were instructed to report any suspicious activity in the neighborhood.
The suspicious vehicle was reported to police.
Suspicious characters were seen hanging around the bank.
He found a suspicious lump on his back and was afraid it might be cancer.
Officials are suspicious about her death.
His manner made me suspicious.
First Known Use of suspicious
Seen and Heard
What made you want to look up suspicious? Please tell us where you read or heard it (including the quote, if possible).