Posi, POSI, or pozi can refer to:
Engineering Pozidriv, a type of screw head and screwdriver Positraction, a limited-slip differential for Chevrolets
Music Posi music, or positive music. Positive hardcore, a subgenre of hardcore punk
Medicine The "position of safe immobilization" used when immobilizing a hand with a splint or cast
Other Posi, Nigeria, a settlement in Badagry Division, Lagos State in Nigeria Posi or Pusai, a Christian martyr
See also Positive (disambiguation)