Definition: Adair is a surname that comes from the English name Adirondack, which means "mountainous" or "mountaintop." It's also possible to derive it from Old French adΓ©ris, meaning "hill," referring to the mountainous landscape of New York State. Here are some examples of how the word 'Adair' can be used: 1. Adair (ad) is a name for someone who was born in the United States and lives in New York City or other parts of the United States. 2. Adair (a) is a surname that comes from the English name Adirondack, which means "mountainous" or "mountaintop." 3. Adair (s) is an Old French word meaning "hill," referring to the mountainous landscape of New York State. 4. Adair (j) is a word ending with a "j" in italics that has been used as a variant spelling of the name Adirondack or Adair. It's used when there are two words with a "j" in them, and one of them ends with the first letter of the first word. 5. Adair (a) is a surname that comes from the English name Adirondack, which means "mountainous" or "mountaintop." 6. Adair (n) is a variant spelling of Adirondack or Adair used to refer to someone who was born in New York City but moved elsewhere. In summary, "Adair" refers to a surname that comes from the English name Adirondack and has two possible meanings: it can also be used for a person born in New York City or other parts of the United States. The word may also have been influenced by Old French adΓ©ris meaning "hill," referring to the mountainous landscape of New York State.