Dictionary.com
Thesaurus.com
Synonyms

suspicious

American  
[suh-spish-uhs] / səˈspɪʃ əs /

adjective

  1. tending to cause or excite suspicion; questionable.

    suspicious behavior.

    Synonyms:
    doubtful, dubious, suspect
  2. inclined to suspect, especially inclined to suspect evil; distrustful.

    a suspicious tyrant.

    Synonyms:
    wary, mistrustful
  3. full of or feeling suspicion.

  4. expressing or indicating suspicion.

    a suspicious glance.


suspicious British  
/ səˈspɪʃəs /

adjective

  1. exciting or liable to excite suspicion; questionable

  2. disposed to suspect something wrong

  3. indicative or expressive of suspicion

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Usage

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. To be suspicious of someone most often involves suspecting that they are engaged in some wrongdoing, as in My parents became suspicious of me when I kept asking whether they’d be home tomorrow.The word is commonly used to describe a person who is suspicious of someone or something in a specific situation. Sometimes, though, it’s used to describe a person who’s suspicious in general—meaning that they’re generally skeptical or distrustful. It can also be used to describe something, such as an action, that indicates that a person is suspicious, as in She gave me a suspicious look that meant she knew I was up to something.Suspicious can also be used to describe someone or something that causes suspicion, as in The guards are trained to identify suspicious people, suspicious behavior, and suspicious packages.Being suspicious is usually based on something, such as a hunch or some kind of evidence, but the word is typically used in situations in which there is some doubt—when someone suspects something, but isn’t sure. The same thing is implied by the verb suspect and the noun suspicion.Suspicious is most commonly used in negative contexts, but this isn’t always the case. For example, you might be suspicious that someone is planning a surprise party for you.Example: Police are encouraging citizens to alert the authorities if they see any suspicious activity on the subway.

Other Word Forms

  • hypersuspicious adjective
  • hypersuspiciously adverb
  • hypersuspiciousness noun
  • oversuspicious adjective
  • oversuspiciously adverb
  • oversuspiciousness noun
  • presuspicious adjective
  • presuspiciously adverb
  • presuspiciousness noun
  • self-suspicious adjective
  • supersuspicious adjective
  • supersuspiciously adverb
  • supersuspiciousness noun
  • suspiciously adverb
  • suspiciousness noun
  • unsuspicious adjective
  • unsuspiciously adverb
  • unsuspiciousness noun

Etymology

Origin of suspicious

First recorded in 1300–50; Middle English, from Latin suspīciōsus, from suspīci(ō) “mistrust” ( suspicion ) + -ōsus -ous

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

I want to take all my stuff, but that might make staff suspicious.

From Literature

The councilman wrote that he was suspicious of flights near critical local infrastructure, including the Shasta Dam and Whiskeytown Dam.

From Los Angeles Times

“I can see how that could look suspicious,” Dr. Achebe said.

From Literature

A spokesperson for Giggling Restaurants, the company that runs the restaurant, said a customer had reported a "suspicious object" to staff on the night it was found.

From BBC

Remarkably, this didn't make Reece suspicious, even when the group later discovered the "bloody" fingerprints on the picture.

From BBC