Longman Dictionary of Contemporary English homepage

Date: 1600-1700
Language: Greek
Origin: semeiotikos 'looking at and understanding signs', from semeion 'sign'

semiotics

 noun
     
Related topics: Linguistics
sem‧i‧ot‧ics also sem‧i‧ol‧o‧gy [uncountable] technical
SL the way in which people communicate through signs and images, or the study of this
—semiotic adjective
—semiotician also semiologist noun [countable]
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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