1rare The grammatical arrangement of words to form sentences; (also) the set of principles governing such arrangement; the branch of grammar concerned with this; = "syntax".
A bend in a fold axis or mountain range where subsidiary axes or ranges diverge; the meeting of mountain ranges at an angle.
rare = syntaxy .
Mid 16th century; earliest use found in John Palsgrave (d. 1554), teacher and scholar of languages. From post-classical Latin syntaxis syntax.