| at first |
in the beginning, or on the first occasion. |
| at first blush |
when first observed; at first glance. |
| cast the first stone |
to be the first to accuse someone of wrongdoing. |
| first aid |
emergency medical treatment for injury or sudden illness, administered before regular medical care or more thorough treatment can be obtained. |
| first base |
in counterclockwise order from home plate, the first of three bases marking the infield of a baseball diamond. [2 definitions] |
| first baseman |
in baseball, the player whose position is at first base when the other team is batting and whose primary function is to defend that base. |
| first cause |
a primary or original source, independent of, and not caused by, anything else. [2 definitions] |
| first class |
the best, finest, or highest in quality, class, grade, or rank. [3 definitions] |
| first cousin |
the offspring of one's uncle or aunt. |
| first dibs |
(informal) the first claim or right to something. |
| first finger |
the finger next to the thumb; forefinger; index finger. |
| first floor |
(chiefly American) the ground floor of a building. [2 definitions] |
| first lady |
(often cap.) the wife or official hostess of a chief executive, esp. of the U.S. president. [2 definitions] |
| first lieutenant |
a commissioned officer of the U.S. Army, Air Force, or Marines, ranking below a captain and above a second lieutenant. |
| first light |
the beginning of daylight; daybreak; dawn. |
| first mate |
the officer of a merchant ship second in rank to the captain; mate. |
| first mortgage |
a primary lien against a piece of property that takes precedence in case of default over all other mortgages or liens except those given priority by law, such as real estate taxes. |
| first night |
the opening performance of a play, opera, movie, or the like, or the night on which this occurs. |
| first off |
before anything else; immediately. |
| first offender |
a person convicted for the first time of an offense against the law. |