Volume of Trade
The quantity of futures contracts transacted over a specified period of time during a trading day.
Investopedia Commentary
The volume of trade can be quoted from the actual number of contracts being traded during the period or it can be quoted according to the quantity of underlying commodities composing the contracts.
See also: Blackboard Trading, Board Broker System, CBOT, Exchange, Fast Tape, Free Crowd System, Futures Contract, Lock Limit, Net Volume, Volume