What does this symbol mean?

Semiology is a study that analyzes the meaning of symbols and signs used in society.

This restaurant offers a variety of dishes.

Semiotics is the study of signs and symbols used in society and culture.

He is deeply interested in academic studies.

He is studying at the library every day.

The interpretation of his poetry varies from person to person.

He is good at interpreting the poem.

This phenomenon remains unexplained for scientists.

What does this symbol mean?