1. Restless, uncomfortable, or impatient due to inactivity 
2. (informal) of a prisoner, mentally unbalanced due to prolonged incarceration

Encyclopedia: Stir-crazy

• semiprecious
• semiprivate
• semipro
• semiprofessional
• semipublic
• semiquaver
• semirigid
• semiskilled
• semisoft
• semisolid
• semisweet
• semisynthetic
• Semite
• semiterrestrial
• Semitic
• Semitic deity
• Semitic-speaking
• Semitism
• semitone
• semitrailer
• semitrance
• semitransparency
• semitransparent
• semitropic
• semitropical