1 In the landscape, a pass between two peaks or ridges. Landscape cols may have been formed by: the headward erosion of a cirque, river capture, the beheading of dip-slope valleys by scarp retreat, or the localized differential erosion of a ridge.

2 In meteorology, a narrow belt of relatively low pressure, but not a depression, between two anticyclones. Here, isobars are few and therefore winds are slack.