Real Dictionary

retire
verb: If you retire to another room or place, you go there.
verb: When a sports player retires from their sport, they stop playing in competitions. When they retire from a race or a match, they stop competing in it.
verb: When older people retire, they leave their job and usually stop working completely.

retire in American English
to go away, retreat, or withdraw to a private, sheltered, or secluded place
to withdraw or move in retreat
intransitive verb: to withdraw, or go away or apart, to a place of privacy, shelter, or seclusion
noun: a movement in which the dancer brings one foot to the knee of the supporting leg and then returns it to the fifth position
noun: a place of withdrawal; retreat
transitive verb: to withdraw from circulation by taking up and paying, as bonds, bills, etc.; redeem

retire in British English
to give up or to cause (a person) to give up his or her work, a post, etc, esp on reaching pensionable age

retire in Insurance
verb: If you retire, you stop work when you have reached a certain age, usually when you are eligible for Social Security or a pension.