Definition from macmillandictionary.com
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Draw a straight line.
a straight road
a perfectly straight path
straight brown hair
Rosie wore a long straight skirt and a long-sleeved jumper.
The picture on that wall isn’t straight.
Make sure you keep your back straight.
He wouldn’t give me a straight answer.
The champion was defeated in straight sets.
their sixth straight win/loss
four straight games/matches
There were five straight days of exams.
She got straight A’s this term.
a straight-A student
I’ll never get the house straight before my parents get home.
a straight whisky
If I give you £10, then we’re straight.
The election is going to be a straight fight between Labour and the Conservatives.