What is the meaning of projection?

noun

• A prediction made by extrapolating from past observations.
• The projection of an image from a film onto a screen.
• A planned undertaking.
  • synonyms: project
• Any structure that branches out from a central support.
• Any solid convex shape that juts out from something.
• Psychiatry) a defense mechanism by which your own traits and emotions are attributed to someone else. (
• The acoustic phenomenon that gives sound a penetrating quality.
  • usage: "our ukuleles have been designed to have superior sound and projection"; "a prime ingredient of public speaking is projection of the voice"
  • synonyms: acoustic projection, sound projection
• The representation of a figure or solid on a plane as it would look from a particular direction.
• The act of projecting out from something.
  • synonyms: protrusion, jut, jutting
• The act of expelling or projecting or ejecting.
  • synonyms: expulsion, ejection, forcing out