stop order

noun
1.
an order from a customer to a broker to sell a security if the market price drops below a designated level.
Also called stop-limit order, stop-loss order.
Origin
1870-75
British Dictionary definitions for stop order

stop order

noun
1.
(stock exchange) an instruction to a broker to sell one or more shares when the price offered for them falls below a stipulated level Also called stop-loss order