輸入 means "import" or "importation." It's the opposite of 輸出 (yushutsu) and refers to the act of bringing goods or services into one country from another for sale. For example, "日本は外国から石油を輸入しています" means "Japan imports oil from foreign countries."

外国の品物を自国に買って入れることです。「食べ物を輸入する」のように使います。