n.
1.transactions (sales and purchases) having the objective of supplying commodities (goods and services)
2.the United States federal department that promotes and administers domestic and foreign trade (including management of the census and the patent office)
3.social exchange, especially of opinions, attitudes, etc.
Idiom of the Day
get mad at (someone or something)
to become angry with someone or something
I often get mad at my friend when he is late.