Software programs or parts of programs obtained from remote systems, transmitted across a network, and executed on a local system without explicit installation or execution by the recipient.
Sources:
NIST SP 800-128
NIST SP 800-171r3
NIST SP 800-53 Rev. 5
NIST IR 8401

  Software programs or parts of programs obtained from remote information systems, transmitted across a network, and executed on a local information system without explicit installation or execution by the recipient.
Sources:
NIST SP 800-18 Rev. 1 under Mobile Code

  Software programs or parts of programs obtained from remote information systems, transmitted across a network, and executed on a local information system without explicit installation or execution by the recipient. Note: Some examples of software technologies that provide the mechanisms for the production and use of mobile code include Java, JavaScript, ActiveX, VBScript, etc.
Sources:
CNSSI 4009-2015

  A program (e.g., script, macro, or other portable instruction) that can be shipped unchanged to a heterogeneous collection of platforms and executed with identical semantics.
Sources:
NIST SP 800-28 Version 2 under Mobile Code
NIST Cybersecurity Framework Version 1.1 under Mobile Code

  Software that is transmitted from a remote host to be executed on a local host, typically without the user’s explicit instruction.
Sources:
NIST SP 800-83 Rev. 1 under Mobile Code

  Executable code that is normally transferred from its source to another computer system for execution. This transfer is often through the network (e.g., JavaScript embedded in a web page) but may transfer through physical media as well.
Sources:
NIST SP 800-63-4 [