Although legal terms are conventionally considered to have self-referential, self-closed meaning independent of context, a legal term only acquires its meaning within a given context. As long as the context varies, the meaning of the same legal term as a signifier may change correspondingly. Based on case studies by applying semiotics, we argue that a legal term is just a sign within its sign system; a legal term as an individual sign does not have any inherent meaning, and its meaning (...) can only exist in the relationship with other signs or sign systems. In other words, a legal term only denotes in a particular temporal and spatial context. Through this study, we conclude four propositions about a legal term as a sign: first, the connection of a legal term with a legal concept is relatively arbitrary; second, the meaning of a legal term exists in a sign system; third, a legal term can be subject to multiple interpretations; fourth, the defining of a legal term may be affected by other sign systems. (shrink)