What does agglutinative mean?
The definition of agglutinative
Ag*glu”ti*na*tive, a.
Etym: [Cf. F. agglutinatif.]

1 Pertaining to agglutination; tending to unite, or having power to cause adhesion; adhesive.
2 (Philol.)
Formed or characterized by agglutination, as a language or a compound. In agglutinative languages the union of words may be compared to mechanical compounds, in inflective languages to chemical compounds. R. Morris. Cf. man-kind, heir-loom, war-like, which are agglutinative compounds. The Finnish, Hungarian, Turkish, the Tamul, etc., are agglutinative languages. R. Morris. Agglutinative languages preserve the consciousness of their roots. Max Müller.