The act of suspecting something or someone, especially of something wrong.
"Her deep suspicion that her partner was hiding money led to a thorough investigation."
In plain English: Suspicion is when you think someone might be doing something wrong without having any proof yet.
"The detective felt deep suspicion that someone had stolen the money from the register."
Usage: Use "suspicion" as an uncountable noun when referring to the general feeling that something is wrong, but use "suspicions" in the plural form when followed by a specific clause introduced by "that." Avoid using "a suspicion of" with abstract nouns like "truth," as this phrase typically requires a concrete substance or quality.
To suspect; to have suspicions.
"The detective's sharp suspicion led him to question every witness in the room."
In plain English: To suspect something as true without having proof is to guess that it might be happening based on what you see or hear.
"The detective began to suspect that someone had stolen the evidence."
From Middle English suspecioun, borrowed from Latin suspīciō, suspīciōnem, from suspicere, from sub- ("up to") with specere ("to look at"). Perhaps partly through the influence of Old French sospeçon (or rather the Anglo-Norman form suspecioun). Equivalent to suspect + -ion.