In semiotics, the study of sign processes (semiosis), the meaning of a sign is its place in a sign relation, in other words, the set of roles that the sign occupies within a given sign relation. This statement holds whether sign is taken to mean a sign type or a sign token. Defined in these global terms, the meaning of a sign is not in general analyzable with full exactness into completely localized terms, but aspects of its meaning can be given approximate analyses, and special cases of sign relations frequently admit of more local analyses.