The Collaborative International Dictionary of English v.0.48:

Pas \Pas\, n. [F. See Pace.]
   1. A pace; a step, as in a dance. --Chaucer.
      [1913 Webster]

   2. Right of going foremost; precedence. --Arbuthnot.
      [1913 Webster]

WordNet (r) 3.0 (2006):

pas
    n 1: (ballet) a step in dancing (especially in classical ballet)

V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

PAS
       Publicly Available Specifications (ISO)


Bouvier's Law Dictionary, Revised 6th Ed (1856):

PASS. In the slave states this word signifies a certificate given by the
master or mistress to a slave, in which it is stated that he is permitted to
leave his home, with the authority of his master or mistress. The paper on
which such certificate is written is also called a pass.