(Britain folklore) A flickering light or lantern, especially over bogs, swamps or marshes, held by a supernatural creature who uses it to lure travelers at night to their demise.

(idiomatic) at one's preference; as one sees fit

A male given name, a shortening of William; also used as a formal given name. / A surname originating as a patronymic.

(American football) A weak-side linebacker.

In the absence of a controlling entity, subordinates will take advantage of circumstances.

A will or testament made by word of mouth only, before witnesses, as by a soldier or seaman, and depending on oral testimony for proof.

Alternative form of at-will

A spiteful or vengeful attitude; a grudge; dislike.

A person's natural inclination; unforced choice / (philosophy) The ability to choose one's actions, or determine what reasons are acceptable motivation for actions, without predestination, fate etc.

(military) Fire when ready. A command that allows troops to use weapons at their discretion and choose their own targets, allowing the individual soldier a greater freedom of timing the shot with target movement and similar.