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.
ventilation shaft - a shaft in a building; serves as an air passage for ventilation. 1  air duct, air passage, airway - a duct that provides ventilation (as in mines) 2  shaft - a vertical passageway through a building (as for an elevator)