The Collaborative International Dictionary of English v.0.48:
Col- \Col-\ A prefix signifying with, together. See Com-. [1913 Webster]The Collaborative International Dictionary of English v.0.48:
Col \Col\, n. [F., neck, fr. L. collum neck.] A short ridge connecting two higher elevations or mountains; the pass over such a ridge. [1913 Webster]WordNet (r) 3.0 (2006):
col n 1: a pass between mountain peaks [syn: col, gap]