From Longman Dictionary of Contemporary Englishcold callˌcold ˈcall verb [transitive] to telephone or visit someone you have never met before and try to sell them something —cold call noun [countable] —cold-calling noun [uncountable]→ See Verb tableFrom Longman Business Dictionarycold callˌcold ˈcall (also blind call)MARKETING if someone who is selling something makes a cold call or a blind call, they telephone someone they have never spoken to before to offer them a product or serviceI’ve started to get cold calls from phone dealerships offering me free upgrades for my phone.Placing blind calls isn’t entirely futile, insists Mr. Sobeck, who guesses that one out of 40 or 50 calls turns up a lead. —cold calling noun [uncountable]Cold calling is an effective sales tactic if it’s done properly. —cold caller noun [countable]A cold-caller mistakenly called the company’s boss. → call