stadium

noun

1. A venue where sporting events are held.

   “He is going for a cricket match at the stadium.”

   “In a convulsion that has caught many in Brazil and beyond by surprise, waves of protesters denounced their leaders for dedicating so many resources to cultivating Brazil’s global image by building stadiums for international events, when basic services like education and health care remain woefully inadequate.”

2. An Ancient Greek racecourse, especially, the Olympic course for foot races.
3. (historical)Synonym of stadion, a Greek unit of length equivalent to about 185 m.

   “Dionysiodorus[…]sent a letter ad superos after he was dead, from the centre of the earth, to signify what distance the same centre was from the superficies of the same, viz. 42,000 stadiums […].”

4. A kind of telemeter for measuring the distance of an object of known dimensions, by observing the angle it subtends.
5. A graduated rod used to measure the distance of the place where it stands from an instrument having a telescope, by observing the number of the graduations of the rod that are seen between certain parallel wires (stadia wires) in the field of view of the telescope.
6. A life stage of an organism.