Lewis & Short

Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.

collis, is (abl. reg. colle, e. g. Ov. M. 1, 698; 14, 90; 14, 333; 14, 822; 14, 836; Caes. B. G. 1, 24; 2, 18; Sall. J. 52, 3: Aventino, Liv. 1, 3, 9 et saep.; colli, Lucr. 2, 317 and 322; Auct. Aetn. 466; gen. plur. collium, Tac. Agr. 37; Lact. Opif. Dei, 10), m. [cel-, root of ex-cello, celsus; cf. calamus], high ground, a hill (opp. mons and campus), Lucr. 5, 1373; Cic. Verr. 2, 3, 18, § 47; Caes. B. G. 2, 8; 7, 19: altus, Ov. M. 15, 306: aperti, Verg. G. 2, 112: aprici, id. E. 9, 49: celsus, id. A. 8, 604: supini, id. G. 3, 555: inter Palatinum Capitolinumque, Liv. 1, 12, 1; cf. id. 5, 54, 3 sq.: Dianae, i.e. Aventinus, Mart. 12, 18, 3.
Poet., = mons: collis Heliconii cultor, Cat. 61, 1.
And in plur.: colles, for a chain of mountains, Sil. 3, 420.
Hence, Ital. collina; Fr. colline.