(computing, Internet) A domain that is immediately subordinate to a top-level domain (whose name appears after it, with a period separating the two).

(Britain) The British cabinet minister, responsible for law and order, who is head of the Home Office.

(computing) A dedicated sector, usually at the beginning (first sector on first track) of a storage medium, that holds special data used to start a system.

Serving or tending to seclude (oneself); affecting seclusion.

A person who secedes or supports secession from a political union or an alliance or organisation.

seceding or supporting secession.

(business) A formula, practice, process, design, instrument, pattern, or compilation of information used by a business to obtain an advantage over competitors within the same industry or profession, which kept secret from those competitors or the public.

(politics, euphemistic) An army.

belonging to the second string of a team / substitute or replacement / second most important

(physics) A technique used to visualize the three-dimensional structure of solids by employing an energetic ion beam to fragment the atomic or molecular constituents from a surface