carrier
n. countablen. a company or vehicle that moves people or goods from one place to another. It can also mean a person or animal that spreads a disease to others.
n. a person, animal, or organization that transports or transmits something. In a commercial context, it refers to a company providing transport services; in a medical context, it refers to an asymptomatic individual capable of transmitting a pathogen.
The mail carrier delivers letters to our house every morning.
The airline is the largest low-cost carrier in the region, serving over fifty different cities.
Public health officials identified several asymptomatic carriers who had unknowingly facilitated the spread of the virus throughout the local community during the holiday season.
Commonly used in compound nouns like 'aircraft carrier', 'mail carrier', or 'budget carrier'.