• 26th letter of the alphabet; unknown, variable (mathematics)
• long metal bar formed into the letter "z" and used to bind the exterior and interior walls of a cavity wall
• sex chromosome in some animals such as chickens and moths (male animals s are zz and female animals are wz)
• indices that are used to estimate the likelihood of bankruptcy (accounting)
a to z
• an a to z is a map or book of maps showing the roads in a particular city or area; a to z is a trademark.
from a to z
• from the beginning to the end, every last detail