1. To make a physical descent on a place or a person: The criminal, Louis, was convicted of assaulting and robbing Warren in the parking lot of the store.

Diana accused her next door neighbor of sexually assaulting her daughter.

2. To use violent force or to bombard someone or the senses with something undesirable or unpleasant: The ears of the people were assaulted by the loud music from the neighbor's apartment.
3. To carry out a military offensive against an enemy using weapons: The unit of special forces parachuted into the camp and assaulted the gang and rescued the hostages that were abducted by the criminals.