Without premeditation; on the spur of the moment; extempore. Obsolete.

Absence of warning; †of unwarning, without premeditation.

(In Scottish legal language.) An unpremeditated outburst of passion. on, upon,rarely of, in (a) suddenty: without premeditation.

Without design or previous intention; as it happens or happened; by mere chance.

At the moment, without premeditation or preparation; at first sight; off-hand. Now usually with reference to speech, composition, or musical…

In adverbial phrases formed with prepositions. = suddenly, adv. (chiefly in sense A. 1). on (upon, with) such a sudden, so suddenly; of (upon) this…

in an extemporal manner; impromptu.

at (theor a) volley, on (or o') the volley, at random, without consideration. Usually with verbs, esp. speak. Obsolete.

at (theor a) volley, on (or o') the volley, at random, without consideration. Usually with verbs, esp. speak. Obsolete.

= extempore, adv., with allusion to trumpery, n. adj.

= unpremeditatedly, adv.

Unpremeditated; esp. of prayer, discourse, composition, etc.; = extempore, adv. 2. Occasionally of a speaker; †formerly also of the ability to speak.

= extempore, v.

in an extemporary manner; without premeditation.

Without preparation or premeditation; off-hand, on the spur of the moment; extempore.

With reference to an act of translation, a sermon, or other activity based on a text: extemporaneously, without preparation or recourse to…

In an unpremeditated manner; without premeditation.

In an impulsive fashion; with, or by means of, impulse; by sudden impulse.

in an extemporaneous manner.

colloquial. Casually, incidentally. Obsolete.

Without thought or premeditation.

on (also upon) the spur of the moment (or occasion,etc.), without premeditation or deliberation; on a momentary impulse; impromptu, suddenly…

quasi-adv.= spontaneously, adv.

colloquial. = promiscuously, adv. 2; without ceremony; casually. Now rare.

In an improvised or impromptu manner; extemporaneously. Somewhat rare.

in an off-handed manner, in a free and easy style, without ceremony, casually.

at the first jet: at the first attempt or impulse. Obsolete.

Colloquial phrases: off the cuff (as if from notes made on the shirt-cuff) originally U.S., extempore, on the spur of the moment, unrehearsed; also…

off the top of one's head (and variants): impromptu, without consideration, superficially; hence top-of-the-head attributive phr.

off the wall (also with hyphens used attributive): unorthodox, unconventional; instinctive, intuitive, off the cuff. (See also quot. 1966.) Also…