Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This

American Heritage Dictionary - Cite This Source - Share This

sus·pi·cious       (sə-spĭsh'əs)  Pronunciation Key  adj.   Arousing or apt to arouse suspicion; questionable: suspicious behavior. Tending to suspect; distrustful: a suspicious nature. Expressing suspicion: a suspicious look. sus·pi'cious·ly adv., sus·pi'cious·ness n.

WordNet - Cite This Source - Share This

suspicious
adjective
1.	openly distrustful and unwilling to confide [syn: leery]
2.	not as expected; "there was something fishy about the accident"; "up to some funny business"; "some definitely queer goings-on"; "a shady deal"; "her motives were suspect"; "suspicious behavior" [syn: fishy]

Webster's Revised Unabridged Dictionary - Cite This Source - Share This

Suspicious

Sus*pi"cious\, a. [OE. suspecious; cf. L. suspiciosus. See Suspicion.]

1. Inclined to suspect; given or prone to suspicion; apt to imagine without proof.

Nature itself, after it has done an injury, will ever be suspicious; and no man can love the person he suspects. --South.

Many mischievous insects are daily at work to make men of merit suspicious of each other. --Pope.

2. Indicating suspicion, mistrust, or fear.

We have a suspicious, fearful, constrained countenance. --Swift.

3. Liable to suspicion; adapted to raise suspicion; giving reason to imagine ill; questionable; as, an author of suspicious innovations; suspicious circumstances.

I spy a black, suspicious, threatening could. --Shak.

Syn: Jealous; distrustful; mistrustful; doubtful; questionable. See Jealous. -- Sus*pi"cious*ly, adv. -- Sus*pi"cious*ness, n.