(obsolete) Not used to travel. / (obsolete) Having no ways or roads; pathless.

(obsolete) A pattern; an exemplar.

(medicine) The act of looking sideways, to the left or right, by moving only one's eyes.

(mathematics) A method for proving Gödel's incompleteness theorems without the assumption that the theory being considered is ω-consistent. While Gödel's original proof uses a sentence that states ...