Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “suspicious”

See all translations

suspicious

adjective uk   /səˈspɪʃ.əs/ us  

suspicious adjective (SEEM GUILTY)

B2 making you feel that something illegal is happening or that something is wrong: Her behaviour was very suspicious. The fire at the bank is being treated as suspicious. It's a bit suspicious that no one knows where he was at the time of the murder. There were some suspicious characters hanging around outside. There's a suspicious-looking van parked at the end of the road. 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.)
More examples

suspicious adjective (DOUBT)

B2 feeling doubt or no trust in someone or something: 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 one another/of each other's motives. My mother has a very suspicious nature (= does not trust people).
More examples
(Definition of suspicious from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of suspicious?
Add Cambridge dictionaries to your browser to your website

Definitions of “suspicious” in other dictionaries

Word of the Day

work out

to exercise in order to improve the strength or appearance of your body

Word of the Day

Byronic, Orwellian and Darwinian: adjectives from names.

by Liz Walter,
April 15, 2015
Becoming an adjective is a strange kind of memorial, but it is often a sign of a person having had real influence on the world. Science is full of examples, from Hippocrates, the Greek medic born around 460 BC, who gave his name to the Hippocratic Oath still used by doctors today,

Read More 

bio-inspiration noun

April 13, 2015
the adoption of patterns and structures found in nature for the purposes of engineering, manufacturing, science, etc. The MIT researchers actually aren’t the only robotics team to turn to cheetahs for bio-inspiration.

Read More