Grammatical Function (definition)
From Scottish Gaelic Grammar Wiki
Refers to the relationships between the main syntactical constructs in a sentence or clause, such as subjects, objects, adjuncts, and compliments.
External Links
http://www.ilc.cnr.it/EAGLES96/synlex/node42.html
http://en.wikipedia.org/wiki/Grammatical_function
http://www.lancs.ac.uk/staff/hollmann/203_week4.pdf