Cool smelling sticks of fragrant shtuff that you light up, so it slow burns white smoke all over the surrounding area. Though many potheads use it to cover up the smell of their dank, it's a false stereotype. A superfluous amount of Febreeze is usually the real pothead dedector.
Also a great word to start a conversation on so you can laugh at people that accidentally say 'incest'.
Me: "He, you like incense?"
Friend: "Yeah, I LOVE incest!"
very fragrant. sometimes used for meditation and/or religious rituals. light the end and it slowly smoulders to the bottom leaving the room smelling of whatever you just burnt.
i use dragons blood, sandalwood, and white sage for meditation.