A woman that is or was a spouse of the political second-in-command or first in the line-of-succession of a political jurisdiction.

The female spouse of the second-in-command or first in the line-of-succession of a political jurisdiction.

A man that is or was a spouse of the political second-in-command or first in the line-of-succession of a political jurisdiction.

plural of security detail

a team, either privately hired or working for a government, that is assigned to provide personal security for an individual or group / Used other than figuratively or idiomatically: see security, detail.

(biology) A remex flight feather that is connected to the ulna

plural of secondary feather

The tendency of small, elegant, and successful systems to be succeeded by overengineered, bloated systems, due to inflated expectations and overconfidence.

plural of second-system syndrome

plural of second-system effect