contestation

[L. contestatio testimony: cf. F. contestation a contesting.]

1. The act of contesting; emulation; rivalry; strife; dispute. «Loverlike contestation.» Milton.

After years spent in domestic, unsociable contestations, she found means to withdraw.

2. Proof by witness; attestation; testimony. [Obs.]

A solemn contestation ratified on the part of God.

noun

A hypothetical controversial proposition: contention, thesis. See opinion.

The noun has one meaning:

Meaning #1: a contentious speech act; a dispute where there is strong disagreement
  Synonyms: controversy, contention, disputation, tilt, argument, arguing