What is the difference between reference and sense?

Answer 1

By means of a reference, a speaker represents something that exists in the outside world, but reference has been expanded to include words that do not have a physical existence in the real world like the words centaur and unicorn, these words have existence in the mythical world. Sense is concerned only with intra-linguistic relations. The sense of a word is its place in a system of relationships which it contrasts with other words in the vocabulary

Answer 2

A reference is the physical entity or object being pointed to, while sense refers to the meaning or concept associated with that reference within a particular context. In other words, reference is the specific thing being referred to, and sense is the idea or meaning behind that reference.