to modify equipment (in airplanes, automobiles, a factory, etc.) that is already in service using parts developed or made available after the time of original manufacture.
2.
to install, fit, or adapt (a device or system) for use with something older: to retrofit solar heating to a poorly insulated house.
verb (used without object)
3.
(of new or modified parts, equipment, etc.) to fit into or onto existing equipment.
4.
to replace existing parts, equipment, etc., with updated parts or systems.
noun
5.
something that has been retrofitted.
6.
an instance of updating, enlarging, etc., with new or modified equipment: A retrofit could save thousands of dollars.
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
the offspring of a zebra and a donkey.
a gadget; dingus; thingumbob.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.