what is an interpreter
noun. An interpreter for the deaf at a church service. An interpreter for the deaf at a church service. The definition of an interpreter is a person or a computer program that translates from one language to another so that people who speak different languages can communicate.nterpreter. 1  a person who interprets; specif., a person whose work is translating a foreign language orally, as in a conversation between people speaking different languages. 2  a computer program that translates and executes, statement by statement, a program written in a high-level language.