A three or four game set in league or tournament competition.

Usually three games or more in a league or tournament.

a hand sculptured finish that comes in three basic styles

a three-parter about three android sisters who are out to destroy Yuna and her happy life

a three phase power source with Thyristor control

Adding up the scores from all the games you have played will give you the total series. Most leagues will play three-game series. It is common to use the series as a measure of success. Big tournaments will play many more games and, instead of recording total pinfall, bowlers compare their positions by talking of how many pins over/under par they are, with par usually being 200 (e.g. +20, -10, just like in golf).

The set of games that make your bock; most leagues are three game series.

(Usually) three strings total (may be 5 or 10 strings, etc.)