Symbolism

When an object, item, word, symbol has a deeper meaning most often symbolizing something else. Symbolism is when an author uses something, such as a rose, to signify some idea. A rose, for example, could signify love or beauty.

Some more examples:
The scales to symbolize justice
A dove for peace
The rose for love, beauty or purity
The lion for strength and courage

Symbolism is the use of a person, an object, a place, or an idea to represent itself and something beyond itself at the same time. Two recognizable examples of symbolism are the Stars and Stripes on the flag; this is the symbol for the United States of America. Another well-known symbol is skull and crossbones, which we all know represent something poisonous.

Again, you do not need to show symbolism in every line of every stanza. Good Luck!