A symbol is something, usually a concrete object, that develops emotional, religious or intellectual associations (abstract) beyond its literal meaning .
In addition, the physical properties of the thing must bear some relation to the feelings or ideas the thing symbolizes. For example, a red rose may symbolize love partly because it is delicate, pretty, smells sweet, is evanescent, is the color of blood, and has thorns.
Most symbols can be understood only in a cultural or traditional context. For example, the cross has powerful emotional associations only within Christianity, and a ring has a long cultural association with unity and hence the ideas of perfection and completeness we hope for in a marriage.
An author uses cultural symbols as a kind of short hand; he can convey a lot of information merely by mentioning a symbol, as in Faulkner’s “A Rose for Emily.”
Symbolism