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a (EN)
article, preposition, letter, adverb, symbol, symbol

This word can also be a form of:
A (letter, noun, symbol)

article “a”

indefinite article a, an (before vowel)
  1. the indefinite article
    She saw a cat sitting on the fence.

preposition “a”

a, an (before vowel)
  1. for each specified unit, e.g. "twice a day"
    She goes there once a day.

letter “a”

a
  1. the lowercase form of the letter "A"
    The word "and" starts with the letter "a".

adverb “a”

a (more/most)
  1. an abbreviation of "across" in crosswords
    I'm stuck on 7a, can you help me with it?

symbol “a”

a
  1. an are, a unit of area one hundredth of a hectare
    They bought land that measured exactly 5a to build their garden.

symbol “a”

a
  1. the symbol for acceleration in physics
    For steadily accelerating objects, we have v = a * t.