the research of nature, structure, and difference of language, including phonetics, phonology, morphology, syntax, semantics, sociolinguistics, and pragmatics.
The study of language.
The research of languages, or associated with beginning, signification, and application of words; glossology.
The science of languages, or regarding the beginning and reputation for words; the overall and comparative study of man languages as well as their particular elements. Also known as relative philology.