Definitions

1. noun

A compound derived from an acid and an alcohol, in which the hydrogen of the acid is replaced by an alkyl or aryl group.

“The chemist studied the properties of various esters in her lab.”

2. noun

A person who owns or manages a building, especially in a college or university.

“The college’s ester was responsible for ensuring the dormitories were well-maintained.”

3. noun

A title of respect for certain people, especially those who hold high-ranking positions in a society or organization.

“The royal ester was invited to the state dinner.”