Definition of "Spare" :

noun: a score in tenpins; knocking down all ten after rolling two balls

noun: an extra car wheel and tire for a four-wheel vehicle

noun: an extra component of a machine or other apparatus

verb: use frugally or carefully

verb: give up what is not strictly needed

"He asked if they could spare one of their horses to speed his journey."

verb: refrain from harming

verb: save or relieve from an experience or action

"I'll spare you from having to apologize formally."

adjective: lacking embellishment or ornamentation

adjective: lacking in magnitude or quantity

"A spare diet."

adjective: thin and fit

"The spare figure of a marathon runner."

adjective: more than is needed, desired, or required

"Sleeping in the spare room."

adjective: kept in reserve especially for emergency use

"A spare tire."

adjective: not taken up by scheduled activities

"Spare time on my hands."