verb

• (intransitive) To be unable to breathe because of obstruction of the windpipe (for instance food or other objects that go down the wrong way, or fumes or particles in the air that cause the throat to constrict).
  "Ever since he choked on a bone, he has refused to eat fish."
• (transitive) To prevent (someone) from breathing or talking by strangling or filling the windpipe.
  "The collar of this shirt is too tight; it’s choking me."
• (transitive) To obstruct (a passage, etc.) by filling it up or clogging it.
  "to choke a cave passage with boulders and mud"
• (transitive) To hinder or check, as growth, expansion, progress, etc.; to kill (a plant by robbing it of nutrients); to extinguish (fire by robbing it of oxygen).
  "Now ’tis the spring, and weeds are shallow-rooted; Suffer them now, and they’ll o’ergrow the garden And choke the herbs for want of husbandry."

noun

• (sports) In wrestling, karate (etc.), a type of hold that can result in strangulation.
• (electronics) A choking coil.