1.
to become hot or warm
SYN warm up :
The oven takes a while to heat up.
2.
( especially NAmE ) = hot up :
The election contest is heating up.
1.
to become hot or warm
SYN warm up :
The oven takes a while to heat up.
2.
( especially NAmE ) = hot up :
The election contest is heating up.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005