1. Discontinuing the meetings of a legislative body without dissolving it: Sometimes the prorogation of some government bodies take place for weeks or even months.
2. In England, the continuance of parliament from one session to another, as an adjournment is a continuance of the session from day to day: To avoid calling new elections, the prime minister decided on a prorogation of the government until after the summer holidays.

This is the established language with respect to the parliament of Great Britain. In the United States, the term prorogation is rarely or never used because "adjournment" is preferred.