Drop line and Drop a line

Drop line noun - A headline with the top line flush left and succeeding lines indented to the right.

Drop a line and drop line are semantically related. in communicate topic. In some cases you can use "Drop a line" instead a verb phrase "Drop line", when it comes to topics like fish, put language down on paper, mutually exchange information, communicate in writing.

Drop a line verb - Communicate (with) in writing.

Drop line and drop a line are semantically related. Sometimes you can replace phrase "Drop line" with "Drop a line", this phrases are similar.