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.

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.

In the UK and various other countries, the second presentation of a bill (proposed legislation) to a parliament or legislature, or chamber thereof, subsequent to the initial announcement of the bill at first reading. It is the first opportunity for debate on the main principles of the bill, and in the UK precedes the committee stage, where the bill is scrutinised in more detail.

(virology) A phenomenon that can develop during a pandemic where after a group recovers and infections appear to decrease, another group becomes infected and causes a recurrence in cases.

Of second resort. / Of mediocre quality or peripheral importance. / At the next-to-lowest supervisory level.

(US, education) A pupil who is in second grade.

An opportunity to redeem oneself after a previous error or failure.

(film) The stand-ins used for setting up a shot, as opposed to the first team of actors who will actually appear in the filmed scene.

plural of second team