Definition of "san"

san¹

noun
plural sans
1. A letter of the Archaic Greek alphabet (uppercase Ϻ, lowercase ϻ) that came after pi and before qoppa.

san²

noun
plural sans
1. (dated, informal) A sanatorium.
  Quotations
  "Haven't you heard?" said Belinda. "Joan's ill! She'd got a high temperature, and she's in bed in the San."
  1940, Enid Blyton, The Naughtiest Girl in the School
  ‘I was in the san for ten months before the war. I know all the gen about being sick.’
  1958, Doris Lessing, A Ripple From the Storm, HarperPerennial, published 1995, page 122
  River Glade Sanatorium, River Glade, June 25, 1931. The "San" at River Glade with the Petitcodiac River in the background.
  2005, Dan Soucoup, Richard Thorne McCully, McCully's New Brunswick, page 137