Abstract: The present application relates to defining acronyms in messages between a sender device and a receiver device. The sender device receives a text content of a message from a user and parses the text content to identify one or more acronyms within the message. The sender device presents, to the user, a secondary task pane including the one or more acronyms present within the message and corresponding acronym definitions in editable text fields and receives, from the user, an update to one or more of the corresponding acronym definitions. The sender device sends the message and metadata including the corresponding acronym definitions to one or more other users. A receiver device receives the message and converts each of the acronyms to a respective hyperlink. The receiver device detects a user interaction with the respective hyperlink for a respective acronym and presents at least the respective first acronym definition.