Sancerre /sɒ̃nˈsɛə(ɹ)/ noun1 •A French wine from Sancerre.In the northern hemisphere, June 21 has the most daylight hours. Pack a picnic—a chilled bottle of Sancerre, cheese, olives, and a nice baguette—and hit the grassy knoll. — 2008 formsSancerres