1 (of metal or sth burning) so hot that it looks red:
Red-hot coals glowed in the fire.
2 showing strong feeling:
her red-hot anger
3 (informal) new, exciting and of great interest to people:
a red-hot issue
4 used to describe the person, animal or team that is considered almost certain to win a race, etc:
The race was won by the red-hot favourite.
