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Definition speed

Etymology 1

From Middle English spede (“prosperity, good luck, quickness, success”), from Old English sp?d (“luck, prosperity, success”), from Proto-Germanic *sp?diz (“prosperity, success”), from Proto-Germanic *sp?an? (“to prosper, succeed, be happy”), from Proto-Indo-European *speh?- (“to prosper, turn out well”). Cognate with Scots spede, speid (“success, quickness, speed”), Dutch spoed (“haste; speed”), German Low German Spood (“haste; speed; eagerness; success”), German Sput (“progress, acceleration, haste”). Related also to Old English sp?wan (“to be successful, succeed”), Albanian shpejt (“to speed, to hurry”) and Russian ???????? (spešít?, “to hurry”), Latin sp?s (“hope, expectation”), sp?r? (“hope”, verb), perhaps also to Ancient Greek ?????? (speúd?, “to urge on, hasten, press on”).

Noun

speed (countable and uncountable, plural speeds)

1. The state of moving quickly or the capacity for rapid motion; rapidity.
2. The rate of motion or action, specifically (mathematics)/(physics) the magnitude of the velocity; the rate distance is traversed in a given time.
3. (photography) The sensitivity to light of film, plates or sensor.
4. (photography) The duration of exposure, the time during which a camera shutter is open (shutter speed).
5. (photography) The largest size of the lens opening at which a lens can be used.
6. (photography) The ratio of the focal length to the diameter of a photographic objective.
7. (slang, uncountable) Amphetamine or any amphetamine-based drug (especially methamphetamine) used as a stimulant, especially illegally.
8. (archaic) Luck, success, prosperity.
9. (slang) Personal preference.
10. (finance, uncountable) A third-order measure of derivative price sensitivity, expressed as the rate of change of gamma with respect to changes in the underlying asset price.

Etymology 2

From Middle English speden, from Old English sp?dan (“to speed, prosper, succeed, have success”), from Proto-Germanic *sp?dijan? (“to succeed”). Cognate with Scots spede, speid (“to meet with success, assist, promote, accomplish, speed”), Dutch spoeden (“to hurry, rush”), Low German spoden, spöden (“to hasten, speed”), German sputen, spuden (“to speed”).

Verb

speed (third-person singular simple present speeds, present participle speeding, simple past and past participle (mostly US) sped or (mostly UK) speeded)

1. (intransitive, archaic) To succeed; to prosper, be lucky.
2. (transitive, archaic) To help someone, to give them fortune; to aid or favour.
3. (intransitive) To go fast.
4. (intransitive) To exceed the speed limit.
5. (transitive) To increase the rate at which something occurs.
6. (intransitive, slang) To be under the influence of stimulant drugs, especially amphetamines.
7. (obsolete) To be expedient.
8. (archaic) To hurry to destruction; to put an end to; to ruin.
9. (archaic) To wish success or good fortune to, in any undertaking, especially in setting out upon a journey.
10. To cause to make haste; to dispatch with celerity; to drive at full speed; hence, to hasten; to hurry.
11. To hasten to a conclusion; to expedite.

Results 498 Words with the letters SPEED

You can also try words with the phrase SPEED, words starting with the letters SPEED, or words ending in the letters SPEED.

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