Consensual \Con*sen"su*al\, a. [See Consent, v. i., and cf. Sensual.]

1. (Law) Existing, or made, by the mutual consent of two or more parties.

2. (Physiol.) Excited or caused by sensation, sympathy, or reflex action, and not by conscious volition; as, consensual motions.

Consensual contract (Law), a contract formed merely by consent, as a marriage contract.

Source: Webster's Revised Unabridged Dictionary (1913)