1. /enkw/ OR /enk/ ENQuire. The mnemonic fORASCII character 5. 2. An on-line convention fOR querying someone' s availability. After opening a chat connection to someone apparently in heavy hack mode, one might type "SYN SYN ENQ?" (the SYNs representing notional synchronisation bytes), and expect a return of ACKORNAK depending on whether OR not the person felt interruptible. Compare ping, finger. [Jargon File] (1998-01-18)