Definitions for "Zack"
Zack is a non-player character from the game Final Fantasy VII. He appears only in flashback sequences, which portray him as almost identical to Cloud Strife (the game's main playable character) in physical appearance except for his black hair. When strung together, the sequences explain a great deal about Cloud's past and his connection to Sephiroth, the game's arch-villain.
Zack Stevens is a character from the Dead or Alive video game series.