noun, verb, dammed, dam⋅ming.| 1. | a barrier to obstruct the flow of water, esp. one of earth, masonry, etc., built across a stream or river. |
| 2. | a body of water confined by a dam. |
| 3. | any barrier resembling a dam. |
| 4. | to furnish with a dam; obstruct or confine with a dam. |
| 5. | to stop up; block up. |

dam 1 (dām) n.
[Middle English.] dam'mer n. |
Dam (dām, däm), (Carl Peter) Henrik. 1895-1976.
Danish biochemist. He shared a 1943 Nobel Prize for the discovery of vitamin K.