suspicious

adjective

sus·​pi·​cious sə-ˈspi-shəs 

1

: tending to arouse suspicion : questionable

suspicious characters

2

: disposed to suspect : distrustful

suspicious of strangers

3

: expressing or indicative of suspicion

a suspicious glance

suspiciously adverb

suspiciousness noun

Synonyms of suspicious

• questionable
• dubious
• disputable
• suspect
• doubtful
• problematic
• debatable

Examples of suspicious in a Sentence

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.

Recent Examples on the Web

Charmed at first, Nella soon becomes confused and suspicious of her alleged ally as their approaches to racial bias and diversity begin to sharply diverge and the story, told through a past and present timeline, unravels with unexpected twists. —Laura Zigman, PEOPLE, 2 May 2026

Los Angeles police evacuated Terminal 2 at LAX on Friday night amid an investigation into a suspicious item. —Matthew Rodriguez, CBS News, 2 May 2026

The investigation began earlier this year when store employees at luxury retailer Nordstrom flagged suspicious return activity at a Glendale location to the Glendale Police Department. —Cierra Morgan, Los Angeles Times, 1 May 2026

Ritty produced his own registers in a room above his bar in Dayton, Ohio, catching the attention of a coal magnate who’d grown suspicious of his own employees. —Alison J. Stein, thehustle.co, 1 May 2026

Word History

First Known Use

14th century, in the meaning defined at sense 1

Rhymes for suspicious

• adventitious
• cementitious
• expeditious
• inauspicious
• injudicious
• meretricious
• repetitious
• superstitious
• surreptitious
• unambitious
• unpropitious
• unsuspicious

Kids Definition

suspicious

adjective

sus·​pi·​cious sə-ˈspish-əs 

1

: likely to arouse suspicion : questionable

suspicious behavior

2

: likely to suspect or distrust

suspicious of strangers

3

: showing suspicion

a suspicious glance

suspiciously adverb

suspiciousness noun