Meaning of externalizer

ex•ter•nal•iz•er

Pronunciation: (ik-stûr'nl-ī"zur), [key]
— n. Psychol.
  1. a person who draws a locus of control from the external world, depending on others as a source of values, ideas, and security.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.