from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A phrase at the beginning of a newspaper or magazine article that gives the date and place of its origin.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A line at the beginning of a document (such as a newspaper article) stating the date and place of origin.
- v. To attach a dateline to a particular document
date + line (Wiktionary)