Definition

1. Noun:
   • A determiner that indicates nonspecific reference: An indefinite article is a grammatical word used before a noun to signal that the noun is not specifically identified or is being mentioned for the first time. In English, the indefinite articles are "a" and "an."

Usage

• The indefinite article is used with singular, countable nouns when the noun is general or its specific identity is not known to the listener.
• "A" is used before words beginning with a consonant sound.
• "An" is used before words beginning with a vowel sound.
• It is not used with plural nouns or uncountable nouns when used in a general sense.

Examples

• Noun:
  • I saw a cat in the garden. (The cat is not a specific, previously identified cat.)
  • She is an engineer. (She is one member of the general class of engineers.)
  • He needs a new phone. (Any new phone, not a specific one.)

Advanced Usage

• "A" vs. "An" based on sound: The choice depends on the sound that follows, not the letter.

  • It will take an hour. ("Hour" begins with a vowel sound /aʊər/.)
  • He is a university student. ("University" begins with a consonant sound /j/.)

• Omission with plural and uncountable nouns: For general statements, no article is used.

  • Cats are independent animals. (General statement about all cats.)
  • She drinks water. (General statement about water as a substance.)

Variants and Related Words

• Definite article (n): The determiner "the," which indicates specific reference.

  • I saw the cat that lives next door. (A specific, known cat.)

• Determiner (n): A word (like a, an, the, some, my) used before a noun to introduce it or provide context.

Synonyms

• Non-specific determiner: A broader term for words that introduce a noun without specifying it.

Notes

• The indefinite article is a core component of English grammar for introducing new, non-specific information into a conversation or text.

Noun

1. a determiner (as `a' or `some' in English) that indicates nonspecific reference