Definition of (just) one of those days
- I missed the bus and it splashed mud all over me; it's just one of those days.
- It was one of those days when nothing was going right.
: 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
: plural of that
: in the daytime repeatedly : on any day
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