What does "allegation" mean?

An assertion, especially an accusation, not necessarily based on facts.

What is a synonym for "allegation"?

Common synonyms include: accusation, assertion, charge, accusal, accusation, accusing.

Pronounced //ˌæl.ɪˈɡæɪ.ʃən//.

/ˌæl.ɪˈɡæɪ.ʃən/ noun

noun ·Moderate ·High school level

Noun

1
An assertion, especially an accusation, not necessarily based on facts.
"She put forth several allegations regarding her partner in hopes of discrediting his actions."
2
statements affirming or denying certain matters of fact that you are prepared to prove wordnet
3
The act of alleging.
4
(law) a formal accusation against somebody (often in a court of law) wordnet

"Tom has denied that allegation."

Borrowed from Middle French allégation, from Latin allegatio, from allegare. See allege.