rapid growth or expansion; (as a count noun) something which has sprung up or become successful very rapidly.

The action of skyrocket, v. (in various senses); esp. the action of increasing abruptly or rapidly.

figurative and in figurative context. chiefly singular. A swelling, onward movement and subsidence (of feeling, thought, opinion, a custom…

figurative. A sudden abrupt rise in position, amount, price, value, or the like; an abrupt change of level either upward or downward; an abrupt…

figurative. The very rapid growth or expansion of a thing.

†(a) slang (apparently) a murder; = bump-off n. (obsolete. rare); (b) a sudden increase (cf. sense 11 and to bump up 1 at bump, v.1 phrasal verbs 1).

= upsurge, n.

A sharp rise in economic activity, demand, prices, etc.

Figurative and metaphorical uses of sense 4. A rapid or sudden marked increase or development.

figurative (or, more frequently, in figurative context) in reference to feelings, influences, actions, events, etc.: Impetuous onset or agitated…

= quantum leap, n. 2.

A sudden, significant, or very evident (usually large) increase or advance.