the discipline that studies the principles of transmiting information and the methods by which it is delivered (as print or radio or television etc.); "communications is his major field of study"
commercial enterprises organized and financed on a scale large enough to influence social and political policies; "big business is growing so powerful it is difficult to regulate it effectively"
the difference in value over a period of time of a country's imports and exports of merchandise; "a nation's balance of trade is favorable when its exports exceed its imports"