1. a U.S. federal health insurance program primarily for people aged 65 and older
Usage: capitalized when referring to the specific U.S. program

Examples

• My grandmother enrolled in Medicare when she turned 65.
• Medicare covers many hospital and medical expenses for seniors.
• The Medicare program helps millions of elderly Americans afford healthcare.
• She had to choose between different Medicare plans during open enrollment.
• Medicare Part A covers hospital stays while Part B covers doctor visits.
• Many retirees rely on Medicare as their primary health insurance.