'space heater' definitions:

Definition of 'space heater'

(from WordNet)
noun
Heater consisting of a self-contained (usually portable) unit to warm a room

Definition of 'space heater'

From: GCIDE
  • space heater \space" heat`er\, n. a portable heating device used for warming the air of a single room; -- it may be electrical or use a combustible fuel. [PJC]