1 (in business) a company that transports people or goods (商业)运输公司:
the Dutch carrier, KLM荷兰航空公司 KLM
2 a military vehicle or ship that is used for transporting soldiers, planes, weapons, etc (军事上的)运输工具:
an aircraft carrier航空母舰
3 a person or animal that can give an infectious disease to others but does not show the signs of the disease 带菌者;携带病毒者:
Some insects are carriers of tropical diseases.某几类昆虫是热带疾病的媒介。