Equivalent to the product of two and nine; one more than seventeen, or eight more than ten; 18.
Eighteen is the age at which many individuals legally become adults in various countries.
There are eighteen holes on a standard golf course, each presenting its own challenges.
The voting age in many democracies is set at eighteen, allowing citizens to participate in electoral processes.
In a deck of cards, there are eighteen cards in each suit, including numbered cards and face cards.
