1.to a considerable degree;
he relied heavily on others' data
2.in a heavy-footed manner;
he walked heavily up the three flights to his room
3.with great force;
she hit her arm heavily against the wall
4.in a manner designed for heavy duty;
a heavily constructed car
5.slowly as if burdened by much weight;
time hung heavy on their hands
6.indulging excessively;
he drank heavily