simple past tense and past participle of tie down

To leave an elevated position to a lower position by one jump.

plural of count down

plural of count-down

Alternative spelling of countdown

Alternative spelling of countdown

To announce the passage of time to a precisely timed expected event. / To await a precisely timed expected event.

(intransitive) To descend, fall down, collapse. / (intransitive) To be demolished. / (intransitive) To decrease. / (intransitive) To reach a decision. / (intransitive) To be passed through time.

(American football) The fourth down in a series that has a maximum of four downs; often used to punt the ball downfield or attempt a field goal (If not punted or converted, the opposing team takes possession wherever the ball is).

(American football) The second down in a series that has a maximum of four downs.