The term 'communicate digitally' can be summarized as the use of digital technology to send and receive messages. This includes the use of email, text messaging, social media, and other forms of digital communication. The crossword solution for this term is 'SIGN, ' which refers to the act of signing a document electronically, such as an email or text message. This is done by using a digital signature, which is a unique code that is used to verify the identity of the sender. Digital signatures are becoming increasingly popular as they provide a secure way to communicate digitally.