Definition from macmillandictionary.com
I’ll warm up some soup for lunch.
Drink this and you’ll soon warm up.
The players are already on the field warming up.
stretching exercises to warm up your calf muscles
The boys warmed up for their big game with a 4–0 win at Derby last week.
In cold weather it takes longer for the car to warm up.
By midnight the party had really warmed up.