1.Definition: (of an alcoholic drink) without water
2.Definition: (of hair) having no waves or curls
"Her naturally straight hair hung long and silky"
3.Definition: accurately fitted; level
4.Definition: characterized by honesty and fairness
6.Definition: following a correct or logical method
7.Definition: free from curves or angles
"A straight line"
8.Definition: having no deviations
"Straight lines", "Straight roads across the desert", "Straight teeth", "Straight shoulders"
10.Definition: in keeping with the facts
"Set the record straight", "Made sure the facts were straight in the report"
11.Definition: neatly arranged; not disorderly
"The room is straight now"
12.Definition: no longer coiled
13.Definition: rigidly conventional or old-fashioned
14.Definition: successive (without a break)
"Sick for five straight days"
15.Definition: without evasion or compromise
"He is not being as straightforward as it appears"