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.
1 Ventilation shaft, vertical passage used in mines and tunnels to move fresh air underground, and to remove stale air. 2  Shaft (civil engineering) , an underground vertical or inclined passageway. 3  Pitch (ascent/descent) , a significant underground vertical space in caving terminology.