Wiktionary
senior citizen
n. An old person; generally, a senior citizen is considered to be over sixty years of age.
WordNet
senior citizen
n. an elderly person [syn: oldster, old person, golden ager]
Usage examples of "senior citizen".
How could a six-foot-three, 210-pound guy who'd been in prison for chrissake be trapped by a senior citizen half his size wearing a flour sack?
She was no ordinary senior citizen, living on Social Security, paying a visit to her butcher's shop, looking forward to bingo on Saturday night.
There was no stiff arm and no limp arm, no scrawny senior citizen.
Well, what would happen is this: I lived there for two years, and each August during the annual heat wave, a senior citizen on an upper floor would pay his rent, lock all of his doors and windows, watch TV, and promptly die.