18th

Before the nineteenth

Eighteenth, the ordinal form of eighteen—indicating position number 18 in a sequence.

The 18th hole completes a round of golf.

The 18th Amendment established Prohibition in the United States; the 21st repealed it.

An 18th birthday marks legal adulthood in many countries.

ordinal

sequence

Ordered succession of elements

eighteenth · series · order · succession · numbering · list

century

Enlightenment

Era prioritizing reason over dogma

Rousseau · Kant · Montesquieu · rococo · baroque · neoclassicism · Georgian · colonialism · revolution · salons

adulthood

maturity

Full growth achieved

consent · adulthood · autonomy · self-sufficiency · milestone · threshold · transition · emancipation · graduation · majority

birthday

celebration

Festive event marking occasion

cake · candles · legal · landmark · coming-of-age · quinceañera · debut · gathering · tradition

amendment

Prohibition

Constitutional alcohol ban era

speakeasies · ratification · Constitution · dry · moonshine · teetotalism

Opposites
ordinal vs cardinal number type

18theighteen

Number after seventeen

cardinal · 18 · cardinal number

ordinal position extremity

18th1st

Earliest in order

first · last · final · ultimate · initial

Phrases
Family

eighth

Familiarity
Top 50,000
Profile
Known to kids · Used worldwide · Timeless · Everyday, not technical · Rated G