Definitions

1. noun

American Express, a multinational financial services corporation, especially its credit card.

“I use my Amex to pay for the hotel room.”

2. verb

to use or pay with American Express, especially a credit card.

“She amexed the purchase online.”

3. verb

to cancel or reverse a transaction.

“The store amexed the faulty product.”

4. verb

to reimburse or compensate someone.

“The company amexed the employee for the overtime work.”