/ ˈmɪdnaɪt; NAmE / noun [ U ]
1.
12 o'clock at night :
They had to leave at midnight .
on the stroke of midnight / shortly after midnight
She heard the clock strike midnight.
We have to catch the midnight train.
2.
( especially NAmE ) = midnight blue
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IDIOMS
see burn verb , flit noun
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WORD ORIGIN
Old English midniht (see mid- , night ).