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Intermediate Dictionary        

on·set

onset

 
 
pronunciation:
an set
part of speech: noun
definition 1: the early stage; beginning.
At the onset of my cold, I went right to bed.
synonyms:
beginning, outset, start
antonyms:
end
similar words:
birth, commencement, dawn, kickoff
definition 2: an attack.
They could not protect themselves against the onset of the enemy.
synonyms:
attack
similar words:
assault, charge, invasion, raid, storming