intransitive. Of a commodity: to rise suddenly in price. Obsolete.

Aeronautics. intransitive. figurative. Of prices, costs, statistics, etc.: to rise sharply; to soar, to rocket.

Of an amount, price, etc.: to rise or increase rapidly. Hence, of a commodity: to increase rapidly in price.

intransitive. To increase suddenly and very rapidly.

intransitive. Esp. of prices or costs: to rise steeply or suddenly.

to go through the roof: to become very angry. Cf. to hit the roof at phrases 9.

To increase rapidly in growth (sometimes, with inclusion of sense 6, to sprout and grow rapidly); to advance to maturity. Now only with up or…