(intransitive) To become covered with or as if with fog. / (intransitive) To become obscured in condensation or water. / (intransitive, photography) To become dim or obscure.

A new growth of grass appearing on a field that has been mowed or grazed. / (UK, dialect) Tall and decaying grass left standing after the cutting or grazing season. / (Scotland) Moss.

(transitive) To pasture cattle on the fog (of), or aftergrass, of; to eat off the fog from (a field). / (intransitive) To become covered with the kind of grass called fog.

(mnemonic) An acronym for the algorithm for multiplying two binomials.

(transitive) To apply the FOIL algorithm to.

(chiefly UK) Alternative spelling of fetus

(chiefly in the plural) A quirk, idiosyncrasy, or mannerism; an unusual habit that is slightly strange or silly. / A weakness or failing of character.

(obsolete) Weak; feeble.

(countable, optics) A point at which reflected or refracted rays of light converge. / (countable, geometry) A point of a conic at which rays reflected from a curve or surface converge.

(intransitive, followed by on or upon) To concentrate during a task. / (transitive) To direct attention, effort, or energy to a particular audience or task.