(intransitive) To increase rapidly to a new value. / (transitive) To increase (something) rapidly to a new value; to cause (something) to ramp up.

A period around midday when an airport has a particularly large amount of air traffic.

To deceive or lead astray with a false light. / To light improperly.

(botany) A rounded tooth or notch of a crenate leaf, or any part that is crenate; a crenelle. / The state of being crenated or notched.