security blanket: Meaning and Definition of
secu'rity blan"ket
- a blanket or other familiar item carried esp. by a young child to provide reassurance and a feeling of psychological security.
- someone or something that gives a person a sense of protection or a feeling of security: His wealthy uncle is his security blanket.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.