The key 101 Okey terms are opening, isleme (laying off), meld, indicator, okey, and the five-pairs opening.

Opening means laying melds worth at least 101 points to get onto the table. Isleme, or laying off, is adding tiles to melds after opening. A meld is a valid run or set. The indicator sets the okey joker, one number above it in the same colour. The five-pairs opening is an alternative to the points route. Knowing this vocabulary makes it far easier to follow strategy guides and play confidently.