slot meaning english- APK IOS V

slot · ​ a long, narrow opening, into which you put or fit something to put some coins in the slot see also mail slot · ​ a position, a time or an opportunity

noun · a narrow, elongated depression, groove, notch, slit, or aperture, especially a narrow opening for receiving or admitting something, as a coin or a letter

slot machine gioco della gallina A narrow notch, groove, or opening, as a keyway in a piece of machinery, a slit for a coin in a vending machine, etc Webster's New World

slot 777 gratis Can anybody explain this notion in English? What I can understand so far: internal slots are not properties