Webster's Revised Unabridged Dictionary · 1913

Philology

Philology (fi*lol"o*jy) , noun

[Latin philologia love of learning, interpretation, philology, Greek filologi`a: compare French philologie. See Philologer.]

1.
Criticism; grammatical learning. [Rare] — Johnson
2.
The study of language, especially in a philosophical manner and as a science; the investigation of the laws of human speech, the relation of different tongues to one another, and historical development of languages; linguistic science.

Philology comprehends a knowledge of the etymology, or origin and combination of words; grammar, the construction of sentences, or use of words in language; criticism, the interpretation of authors, the affinities of different languages, and whatever relates to the history or present state of languages. It sometimes includes rhetoric, poetry, history, and antiquities.

3.
A treatise on the science of language.