pre ‧ heat /ˌpriːˈhiːt/ BrE AmE verb [transitive]
to heat an ↑ oven to a particular temperature before it is used to cook something:
Preheat the oven to 375 degrees.
pre ‧ heat /ˌpriːˈhiːt/ BrE AmE verb [transitive]
to heat an ↑ oven to a particular temperature before it is used to cook something:
Preheat the oven to 375 degrees.
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012