MATRIMO'NIAL, adjective 1. Pertaining to marriage; connubial; nuptial; hymeneal; as matrimonial rights or duties. 2. Derived from marriage. If he relied on that title, he could be but a king at curtesy, and have rather a matrimonial than a regal power.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI