The phrase "major purchase" refers to buying something that costs a significant amount of money. It typically refers to expensive items like a car, house, or furniture, rather than smaller everyday purchases. Full definition
Your credit report and credit score help determine the interest rates lenders are able to offer you when making major purchases such as buying a vehicle or home. (rbfcu.org)
Some cards offer even up to three times the bonus points for major purchases made with the card. (cardrates.com)
Just be careful not to lose them; I would also think twice before putting major purchases on them that I might have cause to return or want purchase protection on. (travelsort.com)