adj

• (geography) Designating the bank of a river (etc.) on one's left when facing downstream (i.e. facing forward while floating with the current); that is, the north bank of a river that flows eastward. If this arrow: ⥲ shows the direction of the current, the tilde is on the left side of the river.
  "The Eiffel Tower is on the left bank of the Seine."
• (politics) Left-wing; pertaining to the political left.
  "It should be noted that there is now no intelligentsia that is not in some sense "Left". Perhaps the last right-wing intellectual was T. E. Lawrence. Since about 1930 everyone describable as an “intellectual” has lived in a state of chronic discontent with the existing order."

noun

• (politics) The left-wing political parties as a group; citizens holding left-wing views as a group.
  "The Left left workers behind, thinking they had a winning demographic coalition. It hasn't really worked out for them yet."
• (boxing) A punch delivered with the left fist.
  "The world 'as got me snouted jist a treat; Crool Forchin's dirty left 'as smote me soul."
• (surfing) A wave breaking from left to right (viewed from the shore).

name

• (politics) The political left wing seen as a whole, as distinguished from an individual left-wing political party.
  "Maybe it’s true that “the Left can’t meme,” if “the Left” refers to the earnest suburban revolutionary with an undercut and a nose ring who typically stalks your replies on X."