Meaning of sporadic

spo•rad•ic

Pronunciation: (spu-rad'ik), [key]

— adj.

(of similar things or occurrences) appearing or happening at irregular intervals in time; occasional: sporadic renewals of enthusiasm.
appearing in scattered or isolated instances, as a disease.
isolated, as a single instance of something; being or occurring apart from others.
occurring singly or widely apart in locality: the sporadic growth of plants.

See also:

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