I.E. is an abbreviation for a latin term. The entire term is 'id est' and this means 'that is'. I.E. is usually used as a way of saying 'for example'. When using I.E. one is usually restating something in a different way. Usually it will take the place of three different phrases in the Englishlanguage. This three phrases are "in other words" "namely" and "that is."