IPA: /ˈkæriər/
KK: /ˈkɛrɪər/
A person or thing that carries or transports something from one place to another.
The delivery carrier brought my package on time.
Carrier → It is formed from "carry" (from Old French *carier*, meaning to transport or convey) and "-er" (meaning a person who). A carrier is a person or thing that carries or transports something.
Think of someone who 'transports' ('carry') something — the '-er' just means a person. A carrier is someone who carries or transports.