sale /ˈseɪl/ noun
plural sales
plural sales
Learner's definition of SALE
[count] : the act of selling something : the exchange of goods, services, or property for money
sales [plural] : the total amount of money that a business receives from selling goods or services
[count] : an event or occasion during which a business sells goods or services at prices that are lower than usual
see also clearance sale
sales [plural] : the business or activity of selling goods or services
often used before another noun
[count] : a public event at which things are sold
see also garage sale, rummage sale, tag sale, yard sale

for sale

: available to be bought

on sale

: available to be bought
chiefly US : selling at a price that is lower than usual

on sale or return

British, business
: with the agreement that products which are not sold will be taken back without having to be paid for