A lone wolf is a wolf that lives independently rather than with others as a member of a pack. The term is also used in reference to people who exhibit characteristics of introversion or a strong preference for independence.

In the animal kingdom, lone wolves are typically older wolves driven from the pack, perhaps by an alpha male, or young adults in search of new territory. Rather than openly challenge the dominance of the pack leaders, many young wolves between the ages of 1 and 4 years leave their family to search for a pack of their own. Some wolves will simply remain lone wolves; as such, these lone wolves may be stronger, more aggressive and far more dangerous than the average wolf that is a member of a pack. However, lone wolves have difficulty hunting, as wolves' favorite prey, large ungulates, are nearly impossible for a single wolf to bring down alone. Instead, lone wolves will generally hunt smaller animals and scavenge carrion. Occasionally, a lone wolf will encounter another lone wolf of the opposite sex, and the two may start a new pack .

Person

When used to describe a person, this term is applied to individuals who prefer solitude, or who work alone. In literature, the term is used to establish a character as aloof and emotionally unable or unwilling to directly interact with other characters in the story. A stereotypical lone wolf will be dark or serious in personality; he is often taciturn, and will distinguish himself through his reserved nature.