an

1. an (article) — sense 1

Definition: Form of a (all article senses).: Used before a vowel sound.

Example: I'll be there in half an hour.

2. an (article) — sense 2

Definition: Form of a (all article senses).: Used before /h/ in a stressed or unstressed syllable.

Example: 1 I waited patiently for the Lord, and he inclined vnto me, and heard my crie.
2 He brought me vp also out of an horrible pit, out of the mirie clay, and set my feete vpon a rock, and established my goings.

3. an (article) — sense 3

Definition: Form of a (all article senses).: Used before one and words with initial ⟨u⟩, ⟨eu⟩ when pronounced /ju/.

Example: God brought him forth out of Egypt; he hath as it were the strength of an unicorn: he shall eat up the nations his enemies, and shall break their bones, and pierce them through with his arrows.

4. an (num) — sense 4

Definition: one