col-

WordReference Random House Learner's Dictionary of American English © 2026

col-¹ ,prefix. 

1. col- is another form of com- that is used before roots beginning with l: collateral.

Col.,  an abbreviation of:

1. Military Colonel.
2. Place Names Colorado.

col.,  an abbreviation of:

1. college.
2. colonial.
3. colony.
4. color.
5. colored.
6. column.

Collins Concise English Dictionary © HarperCollins Publishers::

col- prefix

1. a variant of com-: collateral

WordReference Random House Unabridged Dictionary of American English © 2026

colo-, 

1. a combining form representing colon ² in compound words:
   colostomy.

Also,[esp. before a vowel,] col-. 
Colo., 

1. Place Names Colorado.

WordReference Random House Unabridged Dictionary of American English © 2026

col  (kol; Fr. kôl), n., pl. cols 

(kolz; Fr. kôl). 
1. Geology, Foreign Terms [Physical Geog.] a pass or depression in a mountain range or ridge.
2. Foreign Terms, Meteorology [Meteorol.] the region of relatively low pressure between two anticyclones.

• Latin collum neck
• French
• 1850–55

COL ,

1. cost of living.

col-¹ ,

1. var. of com- before
   l: collateral.

col-² ,

1. var. of colo- before a vowel:
   colectomy.

Col. ,

1. Place Names Colombia.
2. Military Colonel.
3. Place Names Colorado.
4. Bible Colossians.

col. ,

1. Drugs (in prescriptions) strain.
• Latin colā
2. collected.
3. collector.
4. college.
5. collegiate.
6. colonial.
7. colony.
8. color.
9. colored.
10. column.