The wife of one's child.

One's spouse's father. / (dated) A stepfather.

(law) The body of law dealing with the private relations between members of a community; it contrasts with criminal law, military law and ecclesiastical law.

Husband or wife of one's cousin. / Cousin of one's husband or wife.

The brother of one's spouse. / The husband of one's sibling. / The husband of the sibling of one's spouse. / The brother of the spouse of one's sibling.

(law, countable) A law enacted by a legislative body, as opposed to a regulation made by the executive branch or case law made by court precedent.

plural of brother-in-law

Laws that are obvious or common knowledge.

(chemistry, physics) The total pressure of a mixture or gases is the sum of the partial pressures of each gas in the mixture; it is only true for ideal gases.

(computing) An empirical observation that the density of transistors on a chip doubles every two years.