(roofing) A roof system in which the principal roof covering is a single layer of flexible membrane often thermoset or thermoplastic.

(radio) A modification of amplitude modulation that modulates the output signal on a single sideband only, as opposed to both sidebands.

(UK) A single yellow line painted at the side of a road to show that parking is permitted only at specified times.

plural of single-valued function

(programming, object-oriented programming) The principle that every class should have a single responsibility entirely encapsulated by that class.

(photography) Denoting or relating to a type of camera which allows the photographer to view the subject through the same lens that will be used to take a photograph, usually by incorporating a moving mirror and prism.

(photography) Abbreviation of single-lens reflex camera.

plural of single-line whip

(Britain) A non-binding indication, given to an MP by the MP's superiors, of when a vote is expected to take place, and what outcome the MP's party would like.

Scotch made only from the malted barley of a single distillery, unblended with other scotches.