5. (noun)projection any solid convex shape that juts out from something
6. (noun)projection (psychiatry) a defensemechanism by which your own traits and emotions are attributed to someone else
7. (noun)projection, acoustic projection, sound projection the acousticphenomenon that gives sound a penetrating quality "our ukuleles have been designed to have superior sound and projection"; "a prime ingredient of public speaking is projection of the voice"