Definify.com
Webster 1913 Edition
Sporadic
Spo-rad′ic
(-răd′ĭk)
, Adj.
 [Gr. [GREEK] scattered, fr. [GREEK], [GREEK], scattered, fr. [GREEK] to sow seed, to scatter like seed: cf. F. 
sporadique
. See Spore
.] Occurring singly, or apart from other things of the same kind, or in scattered instances; separate; single; 
as, a 
 sporadic 
fireball; a sporadic 
case of disease; a sporadic 
example of a flower.Sporadic disease 
(Med.)
, a disease which occurs in single and scattered cases. See the Note under 
 Endemic
, Adj.
Webster 1828 Edition
Sporadic
SPORADIC
, SPORADICAL,Adj.
 Sporadic diseases are opposed to epidemics, as accidental, scattered complaints, neither general nor contagious.
Definition 2025
sporadic
sporadic
English
Alternative forms
Adjective
sporadic (comparative more sporadic, superlative most sporadic)
- (archaic) (of diseases) occurring in isolated instances; not epidemic.
 -  Rare and scattered in occurrence.
-  2015 March 12, Daniel Taylor, “Chelsea out of Champions League after Thiago Silva sends 10-man PSG through on away goals”, in The Guardian (London):
- It was a stodgy, weary display from Mourinho’s team with only sporadic moments when they threatened Salvatore Sirigu’s goal and their manager seemed bewildered afterwards when he tried to explain what had gone wrong.
 
 
 -  
 - Exhibiting random behavior; patternless.
 
Derived terms
- sporadic E layer
 
Related terms
Translations
rare and scattered in occurrence
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exhibiting random behaviour
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Anagrams
References
- ↑ The Compact Edition of the Oxford English Dictionary, p. 2978.