decay


decay
/dəˈkeɪ/ (say duh'kay)

verb (i)
1. to fall away from a state of excellence, prosperity, health, etc.; deteriorate; decline.
2. to become decomposed; rot.
3. Physics
a. (of a radioactive substance) to transform into a daughter product.
b. (of an elementary particle) to transform into a more stable particle.
4. Electronics (of a current or voltage) to fall away after the source of energy has been removed from the circuit.
verb (t)
5. to cause to decay.
noun
6. a gradual falling into an inferior condition; progressive decline.
7. loss of strength, health, intellect, etc.
8. decomposition; rotting.
9. Physics the disintegration of a radioactive element or the transformation of an elementary particle into one of greater stability.
10. Military the decrease in the radiation intensity of any radioactive material with respect to time.
11. Obsolete a wasting disease, especially consumption.
{Middle English decay(en), from Old French decair, from de- de- + cair (from Latin cadere fall)
decayed, adjective

Australian English dictionary. 2014.

Synonyms:

Look at other dictionaries:

  • Decay — De*cay , n. 1. Gradual failure of health, strength, soundness, prosperity, or of any species of excellence or perfection; tendency toward dissolution or extinction; corruption; rottenness; decline; deterioration; as, the decay of the body; the… …   The Collaborative International Dictionary of English

  • decay — vb Decay, decompose, rot, putrefy, spoil, disintegrate, crumble mean to undergo or, in some cases, to cause something to undergo destructive dissolution. Decay implies change, commonly a natural and gradual change, from a state of soundness or… …   New Dictionary of Synonyms

  • decay — [dē kā′, dikā′] vi. [ME decaien < Anglo Fr & OFr decäir < VL * decadere: see DECADENCE] 1. to lose strength, soundness, health, beauty, prosperity, etc. gradually; waste away; deteriorate 2. to rot or decompose 3. to undergo radioactive… …   English World dictionary

  • Decay — De*cay , v. i. [imp. & p. p. {Decayed}; p. pr. & vb. n. {Decaying}.] [OF. decaeir, dechaer, decheoir, F. d[ e]choir, to decline, fall, become less; L. de + cadere to fall. See {Chance}.] To pass gradually from a sound, prosperous, or perfect… …   The Collaborative International Dictionary of English

  • Decay — De*cay , v. t. 1. To cause to decay; to impair. [R.] [1913 Webster] Infirmity, that decays the wise. Shak. [1913 Webster] 2. To destroy. [Obs.] Shak. [1913 Webster] …   The Collaborative International Dictionary of English

  • decay — [n] breaking down, collapse adulteration, atrophy, blight, caries, consumption, corrosion, crumbling, decadence, decline, decomposition, decrease, decrepitude, degeneracy, degeneration, depreciation, deterioration, dilapidation, disintegration,… …   New thesaurus

  • decay — I verb addle, atrophy, be reduced in worth, become enfeebled, become lower in quality, become putrescent, blight, break down, break up, canker, consume, corrode, corrupt, crumble, decline, decompose, decompound, degenerate, depreciate,… …   Law dictionary

  • decay — ► VERB 1) rot through the action of bacteria and fungi. 2) decline in quality or vigour. 3) Physics (of a radioactive substance, particle, etc.) undergo change to a different form by emitting radiation. ► NOUN 1) the state or process of decaying …   English terms dictionary

  • Decay — Contents 1 Science and technlogy 1.1 Biology 1.2 Physics 1.3 …   Wikipedia

  • decay — {{Roman}}I.{{/Roman}} noun ADJECTIVE ▪ rapid ▪ slow ▪ dental (esp. BrE), tooth ▪ industrial (esp. BrE), urban …   Collocations dictionary

  • decay — 01. The [decaying] leaves in the garden are actually good for it and make the soil richer. 02. Tooth [decay] is preventable with proper oral hygiene. 03. The dentist said my tooth is so [decayed] that he may have to pull it. 04. The rise in… …   Grammatical examples in English