Definition of just onBritish, informal
- It was just on midnight.
: having a basis in or conforming to fact or reason : reasonable
: conforming to a standard of correctness : proper
: faithful to an original
: exactly, precisely
: very recently
: by a very small margin : barely
: archaic variant of joust
What made you want to look up just on? Please tell us where you read or heard it (including the quote, if possible).