symbolism
US /ˈsɪm.bə.lɪ.zəm/
UK /ˈsɪm.bə.lɪ.zəm/

1.
the use of symbols to represent ideas or qualities
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The dove is a common symbolism for peace.
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The novel is rich in religious symbolism.
2.
an artistic and poetic movement or style using symbolic images or indirect suggestion to express mystical ideas, emotions, and states of mind
:
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The late 19th century saw the rise of Symbolism in art and literature.
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His poetry is often associated with French Symbolism.