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 treadmill for English Language Learners. : 1  an exercise machine which has a large belt that moves around while a person walks or runs on it. : 2  a boring or tiring activity, job, etc., in which you repeatedly do the same things.