The sitting of a court, legis-lature, council, commission, etc., for the transaction of its proper business. Hence, the period of time, within any one day, during which such body is assembled in form, and engaged in the transaction of business, or, in a more extended sense, the whole space-of time from its first assembling to lts pro-rogation or adjournment sine die
Source: Black's Law Dictionary 2nd Ed (1910)