Verbal: Stop means stop, apple means apple, crown means crown
Visual: Stop means danger, apple means healthy, crown means king
Index: Something that serves to guide, point out, or otherwise facilitate reference.
Smoke is caused by a fire
Ticking is caused by a clock
Symbol: Often thought to be composed of two inseparable elements: the signifier and the signified. We can have a different signifier tied to the same signified, and vice versa.
Verbal: Apple means temptation, healthy, or fruit
Visual: Scales = Justice, Bird = Peace, Rose = Beauty