An interpreter is a box that takes code in some programming language and executes it. A compiler is a box that takes code is some programming language and translates it into another programming language.
Traditionally, the twain ne'er did meet. However, many (most?) modern interpreters include a compiler as part of their implementation. Using a compiler in this manner is "Just in Time" (JIT) compilation.
So a box that takes Clozure Common Lisp and converts it to machine code is a compiler.
A box that takes Clozure Common Lisp, feeds it into this compiler to obtain machine code, and executes this machine code immediately, is an interpreter, using JIT compilation to do its interpretation.
> An interpreter is a box that takes code in some programming language and executes it.
The interpreter executes that language, not another.
> A box that takes Clozure Common Lisp, feeds it into this compiler to obtain machine code, and executes this machine code immediately, is an interpreter, using JIT compilation to do its interpretation.
It's neither an interpreter not using JIT compilation. It's an AOT compiler. It's just an incremental compiler.
Traditionally, the twain ne'er did meet. However, many (most?) modern interpreters include a compiler as part of their implementation. Using a compiler in this manner is "Just in Time" (JIT) compilation.
So a box that takes Clozure Common Lisp and converts it to machine code is a compiler.
A box that takes Clozure Common Lisp, feeds it into this compiler to obtain machine code, and executes this machine code immediately, is an interpreter, using JIT compilation to do its interpretation.