Definitions

1. adjective

extremely heavy; the greatest in weight or heaviness

“The heaviest suitcase in the luggage compartment was causing a problem during the flight.”

2. noun

the greatest in weight or heaviness

“The heaviest object on the table was a large stone statue.”

3. adverb

to the greatest extent or degree; extremely heavily

“The plane was heaviest loaded for the long flight across the ocean.”