Definitions

1. noun

a person who formulates or develops a theory or theories, especially in a particular field or discipline.

“The economist was a renowned theorist in the field of macroeconomics.”

2. noun

a person who applies theoretical principles to the solution of practical problems, especially in a particular field or profession.

“She was a skilled architect who worked as a theorist to design sustainable buildings.”

3. verb

to formulate or develop a theory or theories, especially in a particular field or discipline.

“He theorized that the new technology could revolutionize the industry.”