1. Designed for or restricted to a single person
   "Sarah Silverman's hilarious one-woman show"
   - one-man, one-person

See also: single

• Sipah-e-Sahaba
• siphon
• siphon off
• Siphonaptera
• Siphonophora
• siphonophore
• SIPP
• sipper
• sippet
• Sipuncula
• sipunculid
• Siqueiros
• sir
• Sir Alan Hodgkin
• Sir Alec Guinness
• Sir Alexander Fleming
• Sir Alexander Korda
• Sir Alexander Mackenzie
• Sir Alexander Robertus Todd
• Sir Alfred Charles Bernard Lovell
• Sir Alfred Hitchcock
• Sir Angus Wilson
• Sir Anthony Hopkins
• Sir Anthony Philip Hopkins
• Sir Anthony Vandyke