| The American Heritage® Dictionary of the English Language: Fourth Edition. 2000. |
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| a1 |
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| PRONUNCIATION: |   |
| VARIANT FORMS: | or A |
| NOUN: | Inflected forms: pl. a's or A's also as or As
1. The first letter of the modern English alphabet. 2. Any of the speech sounds represented by the letter a. 3. The first in a series. 4. Something shaped like the letter A. 5. A The best or highest in quality or rank: grade A milk. 6. Music a. The sixth tone in the scale of C major or the first tone in the relative minor scale. b. A key or scale in which A is the tonic. c. A written or printed note representing this tone. d. A string, key, or pipe tuned to the pitch of this tone. 7. A One of the four major blood groups in the ABO system. Individuals with this blood group have the A antigen on the surface of their red blood cells, and the anti-B antibody in their blood serum. | | IDIOM: | from A to Z Completely; thoroughly.
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| The American Heritage® Dictionary of the English Language, Fourth Edition. Copyright © 2000 by Houghton Mifflin Company. Published by the Houghton Mifflin Company. All rights reserved. |
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