Difference between a compiler and an interpreter

A compiler translates code from a source language to a target language, which can then be executed by a  machine.
An interpreter reads code in an interpreted language (e.g. PHP, Perl, JavaScript) and directly executes the contained instructions.
Difference between compilation and interpretation

Without giving the definition for both words,A compilation is several things from A specific origin grouped together. and A iterpretation is making A opinion based judgement from the evidence on hand.