pensioner

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun One who receives a pension.
• noun One who is dependent on the bounty of another.
• noun A gentleman-at-arms.
• noun An attendant; a retainer.

from The Century Dictionary.

• noun One who is in receipt of a pension or stated allowance, either in consideration of past services or on account of injuries received in service, etc.
• noun A person who is dependent on the bounty of another; a dependent.
• noun In the University of Cambridge, one who pays for his commons out of his own income: the same as a commoner at Oxford.
• noun One who lives in a pension or boarding-house; one who lives in any institution as a boarder; a boarder.

from the GNU version of the Collaborative International Dictionary of English.

• noun One in receipt of a pension; hence, figuratively, a dependent.
• noun One of an honorable band of gentlemen who attend the sovereign of England on state occasions, and receive an annual pension, or allowance, of £150 and two horses.
• noun In the university of Cambridge, England, one who pays for his living in commons; -- corresponding to commoner at Oxford.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun Someone who lives on a pension.
• noun Someone who is at the age at which one typically receives a pension; an elderly person.
• noun obsolete, UK A student who is not dependent on any foundation for support, but pays all university charges; at Oxford called a commoner.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun the beneficiary of a pension fund