Definitions of message:

• noun:   a communication (usually brief) that is written or spoken or signaled

  Example: "He sent a three-word message"

• noun:   what a communication that is about something is about
• verb:   send a message
• verb:   send as a message

  Example: "She messaged the final report by fax"

• verb:   send a message to

  Example: "She messaged the committee"