in an efficacious manner

(American football) An option, for a team that has scored a touchdown, to gain two points by getting the ball into the end zone by a running or pass play, in lieu of a kicked extra point.

(audio, headphones) Pressing onto the ears, and sealing the outer ear (as opposed to being placed in the ear, or hanging onto the ear, or surrounding the ear).

A female lamb. / A poor person's sole possession (in reference to the Bible, 2 Samuel xii).