The crime of assault varies from state to state (and under federal law), but is generally defined as intentionally putting another person in reasonable apprehension or fear of an imminent (immediate) harmful or offensive contact. The crime of assault may be committed even if there is no physical contact, as the criminal physical contact constitutes the separate crime of battery.

The crime of assault with a deadly weapon (also known as aggravated assault) occurs when someone uses a deadly weapon (gun, knife, club, tire iron, brass knuckles, etc.) during an assault.

In Alaska, assault is defined under Alaska Statutes Section 11.41.200 - 11.41.220. Assault in the state can range from a Class B misdemeanor to a Class A felony, depending on the severity and circumstances of the offense. The basic form of assault, which involves placing another person in fear of imminent physical injury, is classified as assault in the fourth degree, a Class A misdemeanor. Assault with a deadly weapon, known as 'assault in the first degree' in Alaska, is a more serious offense and is classified as a Class A felony. This occurs when a person intentionally causes serious physical injury to another, or with a dangerous instrument (which can include firearms, knives, or other deadly weapons), they knowingly engage in conduct that results in serious physical injury to another under circumstances manifesting extreme indifference to the value of human life. Alaska law also recognizes 'assault in the second degree' and 'assault in the third degree,' which involve different levels of intent and harm, and the use of dangerous instruments or causing fear of imminent serious physical injury. These are classified as Class B and Class C felonies, respectively. It's important to note that actual physical contact is not necessary for an assault charge; the threat or fear of harm is sufficient.