名詞 referent:

1. something referred to; the object of a reference
2. the first term in a proposition; the term to which other terms relate
3. something that refers; a term that refers to another term

形容詞 referent:

1. having reference

ref.er.ent

n.（名詞）
Something that refers, especially a linguistic item in its capacity of referring to a meaning.
能指事物：能指稱之物，特指有能夠指稱某種意思的能力的一語言成份
Something referred to.
所指事物