Alternative form of four square / (cryptography) A four-square cipher. / (architecture, US) A boxy style of domestic architecture with four rooms to a floor, one of which is usually a stair hall.

(heraldry) Having the ends forked or branched, and the ends of the branches terminating abruptly as if cut off; said of an ordinary, especially of a cross.

plural of fourchette

(now archaic) Eighty. / (idiomatic) A full-length life, reckoned as eighty years.

A quantity or amount of eighty.

Any of a number of people who have a common great-great-great-grandparent.

(bowed string instruments) pinky (smallest finger) / (keyboard instruments) ring finger

(US) A former class of mail consisting mostly of heavier printed matter.

Four times as great; quadruple. / Comprised of four individual members.

by a factor of four