the first of four consecutive plays during which an offensive team must advance the ball at least ten yards to retain possession of it.
a gain of ten or more yards by an offensive team that entitles it to continued possession for a new series of downs.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for first down
Contemporary Examples of first down
In Week 2, New York Jets wideout Santonio Holmes bobbled and dropped what would have been a first-down pass.The NFL Replacement Referees’ 6 Worst Blown Calls (VIDEO)
September 26, 2012