eta meaning, definition, what is eta: the seventh letter of the Greek alphabet. Learn more.
shafts definition, shafts meaning | English dictionary. shaft. 1 the long narrow pole that forms the body of a spear, arrow, etc. 4 a rod or pole forming the handle of a hammer, axe, golf club, etc.
Definition of tunnel. 1  1a : a covered passageway; specifically : a horizontal passageway through or under an obstructionb : a subterranean gallery (as in a mine)c : burrow. 2  2 : a hollow conduit or recess : tube, well.