The Collaborative International Dictionary of English v.0.48:

Stateless \State"less\, a.
   Without state or pomp.
   [1913 Webster]

WordNet (r) 3.0 (2006):

stateless
    adj 1: without nationality or citizenship; "stateless persons"
           [syn: homeless, stateless]

The Free On-line Dictionary of Computing (30 December 2018):

stateless

   A stateless server is one which treats each request as an
   independent transaction, unrelated to any previous request.
   This simplifies the server design because it does not need to
   allocate storage to deal with conversations in progress or
   worry about freeing it if a client dies in mid-transaction.  A
   disadvantage is that it may be necessary to include more
   information in each request and this extra information will
   need to be interpreted by the server each time.

   An example of a stateless server is a web server.
   These take in requests (URLs) which completely specify the
   required document and do not require any context or memory of
   previous requests.

   Contrast this with a traditional FTP server which conducts
   an interactive session with the user.  A request to the server
   for a file can assume that the user has been authenticated and
   that the current directory and transfer mode have been set.