col

Short definition from Wiktionary

Noun

1. 1
   A dip on a mountain ridge between two peaks.
2. 2
   A pressure region between two anticyclones and two low-pressure regions.
3. 3
   Clipping of column.
4. 4
   Abbreviation of color.
5. 5
   Initialism of cost of living.

Proper noun

1. 1
   Abbreviation of Colima: a state of Mexico.
2. 2
   Abbreviation of Colorado: a state of the United States.
3. 3
   A diminutive of the male given name Colin.