Definitions
1.Nounside; one half (left or right, top or bottom, front or back, etc.) of something or someone.
2.Nounside; a group of people of a certain allegiance or adherence. Usage examples: mother's side, German side in WWII, supporters/fans of a sports team, etc.
3.Noun(law) party; a person or group of people constituting a particular side in a contract or legal action.