eighteen

• Número 18; numeral cardinal que denota la suma de diez y ocho. También puede referirse al ordinal decimoctavo o a lo relacionado con la edad de dieciocho años.

The number 18; a cardinal number representing the sum of ten and eight.

1. Number eighteenA1formal

   Being one more than seventeen; the number 18.

   Número dieciocho

   • She is eighteen years old today.
   • There are eighteen students in the class.
   • The building has eighteen floors.

• Sustantivo que designa el número cardinal resultante de sumar diecisiete más uno, y la cifra que lo representa; también puede referirse a un grupo de dieciocho elementos o a la edad de dieciocho años.

A noun referring to the cardinal number that is the sum of seventeen and one.

1. Number 18A1formal

   The cardinal number that is the sum of seventeen and one.

   El número dieciocho

   • There are eighteen students in the class.
   • She turned eighteen last week.
   • The package weighs eighteen kilograms.

• Numeral cardinal que designa la cantidad de dieciocho objetos, personas o unidades de cuenta; también se usa como sustantivo, determinante o pronombre.

The cardinal numeral representing the quantity of eighteen units; the eighteenth positive integer following seventeen; a composite number (2×3²); culturally significant as the age of legal adulthood in many countries. Also functions as a noun (denoting the symbol, quantity, or group of eighteen), adjective/determiner (modifying nouns to indicate quantity), and pronoun (standing in for a plural noun phrase).

1. Cardinal numeral: the number 18A1formal

   Used to denote a quantity of eighteen persons or things; the eighteenth positive integer in the sequence of natural numbers; a composite number (2×3²); represents an eighteenfold quantity in counting, mathematics, and everyday usage.

   Dieciocho

   • There are eighteen holes in a standard round of golf.
   • She scored eighteen points in the handball match.
   • Eighteen plus eighteen equals thirty-six.
   • In many countries, you can vote at eighteen.
   • He memorized eighteen new phrases this week.

2. Noun: the number, symbol, or group of eighteenA2formal

   A noun referring to the cardinal number eighteen; the numeral symbol 18 or XVIII; a set, collection, or group consisting of eighteen items; a playing card displaying eighteen (in extended decks); a team or ensemble of eighteen members.

   El número dieciocho

   • The number eighteen marks the age of legal majority in many jurisdictions.
   • Circle the eighteens in this statistical report.
   • The choir includes a eighteen of vocalists.
   • In some card variants, the eighteen carries special scoring value.
   • The committee consists of a eighteen of appointed members.

3. Adjective/Determiner: amounting to eighteenA1formal

   Used attributively before a noun to indicate that the quantity or number of the noun is eighteen; modifies plural countable nouns to specify exact quantity.

   dieciocho (adjetivo determinativo)

   • They booked an eighteen-week language course.
   • We need eighteen additional microphones for the conference.
   • The experiment requires eighteen milliliters of the reagent.
   • She has eighteen years of experience in software development.
   • Eighteen European cities participated in the sustainability initiative.

4. Pronoun: eighteen people or things (plural)B1formal

   Used as a pronoun to refer to eighteen previously mentioned or understood persons or things; takes plural verb agreement.

   dieciocho (pronominal)

   • Eighty applied, but only eighteen were selected for the scholarship.
   • I invited seventy guests; eighteen confirmed their attendance.
   • How many participants do we need? — Eighteen will be ideal.
   • Several firms submitted proposals, but eighteen advanced to the final review.
   • Of the manuscripts evaluated, eighteen were accepted for publication.