The action of irrupting or breaking into; a violent entry or invasion; an inbreaking; an intrusion.
An abrupt increase in the size of a movement or organization.
An abrupt increase of an animal population.
A sudden and temporary burst of energy, activity, or emotion.
A sudden, involuntary contraction of a muscle, a group of muscles, or a hollow organ.
A violent, excruciating seizure of pain.
To produce and undergo a spasm or series of spasms.