Definitions

1. noun

A type of airport code, such as the one for Ronald Reagan Washington National Airport, or an abbreviation for a Doctor of Chiropractic Arts

“The flight arrived at DCA airport last night.”

2. noun

A type of college or university degree, such as Doctor of Chiropractic Arts

“He earned his DCA in chiropractic medicine from a renowned institution.”

3. initialism

Initialism for Doctor of Chiropractic Arts

“She is a DCA and runs her own chiropractic practice.”