- heav|ilyW3 [ˈhevıli] adv1.) in large amounts, to a high degree, or with great severity= ↑very▪ I became heavily involved in politics.▪ The report was heavily criticized in the press.▪ a heavily populated area▪ thousands of heavily armed troops▪ His wife was heavily pregnant at the time.it rains/snows heavily▪ It's been raining heavily all day.drink/smoke heavily▪ Paul was drinking heavily by then.heavily dependent/reliant/influenced▪ Britain is heavily dependent on imports for its raw materials.2.) sleep heavilyif you sleep heavily, you cannot be woken easily3.) breathe heavilyto breathe slowly and loudly▪ Breathing heavily, I stopped and sat down to rest.4.) heavily builthaving a large broad body that looks strong5.) if you do or say something heavily, you do it slowly and with a lot of effort, especially because you are sad or bored▪ He was walking heavily, his head down.▪ Emily sighed heavily.▪ 'I suppose so,' she said heavily.6.) be heavily into sth informalto do something a lot or be very interested in it▪ Sid was heavily into drugs by the time he left school.
Dictionary of contemporary English. 2013.