A grandfather of one's spouse.

(law) The area of law pertaining to the relationships between private persons (natural or legal persons including corporations), as opposed to relations between the state and private persons.

Used other than figuratively or idiomatically: see feudal, law.

A wife in law only, such as one who has abandoned her husband / A wife who provides domestic or social support, but not love or affection

A husband in law only, such as one who has abandoned his wife / A husband who provides legally required support, but not love or affection

Indicates disapproval of a situation.

An adage which states that if anything can go wrong, then it will at the worst possible moment.

(law) The body of now archaic legal terms used in the United Kingdom descended from the Anglo-Norman dialect of Old French.

plural of niece-in-law

(chemistry) The principle that chemical properties of the elements are periodic functions of their atomic numbers