(science fiction, fantasy) One who is not from the local planet/world/plane/dimension/universe.

(sports, chiefly ice hockey) The starting point in a match of ice hockey, where two players face each other to snatch the puck.

(intransitive) To confront (each other).

plural of node of Ranvier

(optics) The angle between the perpendicular and a ray reflected from a surface

An individual who is employed by or represents any department or agency of the United States Government.

(informal) To leave abruptly. / To clear the table.

To follow (a leader or de facto leader) without question or thought, with potential disastrous consequences

(optics) The angle between the perpendicular and a ray refracted at a surface

(slang, transitive) To annoy.