What do 'recto' and 'verso' mean?

Against Longships fog

Art UK Discover Stories

The Market Hall

Art UK Discover Stories

Group of Five Women Mocking an Effaced Figure (Falstaff in the

Verso / recto

Against Longships fog

Night and Day (verso)

The Market Hall

Recto and verso - Wikipedia

Ship Tavern Sign

Verso / recto