The objective of the Instrumentality
Project was the artificial evolution
into a "perfect single being"
. This single being
means a life
form which ends as a single individual
(encompassing everyone, i.e. a lack of personal individuality), and is used to differentiate from "colony
" - a life form comprised of multiple
Source: The End of Evangelion : Glossary contained within The End of Evangelion - Theatrical Program.