Definition of sporadically
: in a sporadic manner : not regularly or constantly
gunfire being heard sporadically software updates that appear sporadically Originally from the western Pacific Ocean, the shrimp have been spotted sporadically in U.S. waters for the past two decades.— Rick Jervis Even when the sun is being well behaved, parcels of plasma shoot sporadically toward Earth's dark side, prompting a bright aurora and intensifying radiation belts.— Tim Beardsley
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Merriam-Webster unabridged
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Time Traveler for sporadically
The first known use of sporadically was in 1681
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