The Collaborative International Dictionary of English v.0.48:

Atlas \At"las\, n. [Ar., smooth.]
   A rich kind of satin manufactured in India. --Brande & C.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Atlas \At"las\, n.; pl. Atlases. [L. Atlas, -antis, Gr. ?, ?,
   one of the older family of gods, who bears up the pillars of
   heaven; also Mt. Atlas, in W. Africa, regarded as the pillar
   of heaven. It is from the root of tlh^nai to bear. See
   Tolerate.]
   1. One who sustains a great burden.
      [1913 Webster]

   2. (Anat.) The first vertebra of the neck, articulating
      immediately with the skull, thus sustaining the globe of
      the head, whence the name.
      [1913 Webster]

   3. A collection of maps in a volume;

   Note: supposed to be so called from a picture of Atlas
         supporting the world, prefixed to some collections.
         This name is said to have been first used by Mercator,
         the celebrated geographer, in the 16th century.
         [1913 Webster]

   4. A volume of plates illustrating any subject.
      [1913 Webster]

   5. A work in which subjects are exhibited in a tabular from
      or arrangement; as, an historical atlas.
      [1913 Webster]

   6. A large, square folio, resembling a volume of maps; --
      called also atlas folio.
      [1913 Webster]

   7. A drawing paper of large size. See under Paper, n.
      [1913 Webster]

   Atlas powder, see Atlas powder in the vocabulary; a
      blasting compound containing nitroglycerin.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Atlas
    n 1: (Greek mythology) a Titan who was forced by Zeus to bear
         the sky on his shoulders
    2: a collection of maps in book form [syn: atlas, book of
       maps, map collection]
    3: the 1st cervical vertebra [syn: atlas, atlas vertebra]
    4: a figure of a man used as a supporting column [syn: atlas,
       telamon]

The Free On-line Dictionary of Computing (19 January 2023):

Abbreviated Test Language for Avionics Systems
ATLAS

    (ATLAS) A Mil-spec language for automatic testing
   of avionics equipment.  ATLAS replaced Gaelic and several
   other test languages.

   ["IEEE Standard ATLAS Test Language", IEEE Std 416-1976].

   (2000-04-03)