He felt terrible, especially because it was his friend who had clearly been the instigator of the fight.
He was definitely an instigator [of the conversation], but I never felt intimidated.
Bodley evidently was, if not the instigator, at any rate the paymaster for this second journey.
All at once it occurred to him that some reward was due the instigator of his success.
He is said to have been the instigator of the fierce persecution of the Christians under Galerius in 303.
Had Madame, therefore, been the instigator of the revenge, she would have been right.
Sometimes, I fancy that the instigator of the crime was a man who was in love with me.
I felt sure that a plot had been formed against me, and that he was its framer and instigator.
Just now she is making donations of pipes, tobacco, handkerchiefs (her own or The instigator's), and good advice on matrimony.
I was the instigator of the mischief, I pulled the wires, and if we are questioned let me speak first.
1590s, from Latin instigator, agent noun from instigare (see instigation). Fem. formation instigatrix is recorded from 1610s.