Signifier: In semiotics, a signifier refers to the physical form of a sign - such as the word 'dog' or an actual image of a dog. It represents something tangible that conveys meaning.
Signified: The signified is the concept or idea represented by the signifier. For example, when we see the word 'dog,' we think about furry four-legged animals associated with loyalty and companionship.
Symbolism: Symbolism refers to the use of symbols in communication to represent abstract ideas or concepts. It can be found in literature, art, advertising, where objects or actions take on deeper meanings beyond their literal representation.