Definition of spousal

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spou·sal    (spouzl, -sl) KEY 

ADJECTIVE:

1. Of or relating to marriage; nuptial.
2. Of or relating to a spouse.

NOUN:

Marriage; nuptials. Often used in the plural.

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ETYMOLOGY:
From Middle English spousaille, marriage, from Old French espousaille, from Latin spnslia, betrothal, from neuter pl. of spnslis, of marriage, from spnsus, past participle of spondre, to pledge ; see spouse