Step in system design; for example, selecting functional units, assigning their locations, and defining their interconnections.
Source(s):
NIST SP 800-82 Rev. 2 under Configuration (of a system or device) from IEC/PAS 62409

  The possible conditions, parameters, and specifications with which an information system or system component can be described or arranged.
Source(s):
NIST SP 800-128 under Configuration
NIST SP 800-128

  The selection of one of the sets of possible combinations of features of a system.
Source(s):
NISTIR 5153 under Configuration from ITSEC Ver. 1.2