An electromagnetic wave of constant amplitude and frequency, typically a sine wave, that for mathematical analysis is considered to be of infinite duration.

(grammar) A verb tense expressing ongoing action; in English, any of the tenses formed with the present participle, namely present continuous ("I am dreaming"), past continuous ("I was dreaming"), present perfect continuous ("I have been dreaming"), past perfect continuous ("I had been dreaming"), future continuous ("I will be dreaming") or future perfect continuous ("I will have been dreaming").

Alternative form of noncontinuous

(automotive) Any of several forms of automatic transmission, without specific gears, in which the gear ratio may be changed without any noticeable steps.

(grammar) A tense that expresses an unbroken action continuing up to a certain time in the past. In English it is formed by using had been with a present participle.

(grammar) A tense used to express an ongoing action completed after some time in the future. In English it is formed by use of will have been (or shall have been) and a present participle.

(grammar) A tense that expresses an unbroken action continuing at the present time, started in the past. In English it is formed by using have been with a present participle.

(of a real-valued function on a topological space) Such that, for each fixed number, the subspace of points whose images are at least that number is closed.

(of a real-valued function on a topological space) Such that, for each fixed number, the subspace of points whose images are at most that number is closed.

plural of continuously variable transmission