pl. n. justicars; common modern misspelling of justiciar, justiciars
1. n. justiciar, in medieval England and Scotland, a king’s minister (as in a politician who makes and implements policy); the Chief Justiciar would be the equivalent of a Prime Minister; may also refer to a high-ranking judge or judicial officer; from Latin justiciarius, justitiarius “man of justice, judge”; c. 15th century.
2. in Vampire: the Masquerade, the most powerful public rank in the Camarilla, just above archon; the justicars are chosen by the secretive Inner Circle, and there is one for each Camarilla clan.
3. in World of Warcraft, a PvP achievement.
4. in Mass Effect, an Asari alien who has forsworn family and worldly possessions, and wanders space as a knight errant.
5. in the MMORPG Star Wars: The Old Republic, one of a militia of former Republic soldiers on ancient Coruscant.
Addendum: I haven’t been able to determine why games from V:tM on have misspelled “justiciar” as “justicar.” Furthermore, every game seems to use the word differently, although there is some weird idea going around that it means the same thing as “paladin.” Only V:tM uses it in a way consistent with the original meaning.