ageist

(noun, adjective)

adjective

1. Unfairly discriminatory against someone based on their age.

- Upon hearing that his employer would soon require yearly physical examinations and vision screening, my father exclaimed that the policy was ageist.

- Even though she had succeeded in the phone interview, when the ageist employer learned that the candidate was only 18 years old, she became hesitant.

noun

1. A person who behaves in an ageist manner.

- He didn’t like to think of himself as an ageist, but he had to admit that he hadn’t considered the needs of some of the more elderly participants.