"sines" in the noun sense
1. sine, sin
ratio of the length of the side opposite the given angle to the length of the hypotenuse of a right-angled triangle
"sines" in the verb sense
1. sin, transgress, trespass
commit a sin violate a law of God or a moral law
2. drop the ball, sin, blunder, boob, goof
commit a faux pas or a fault or make a serious mistake
"I blundered during the job interview"
Source: WordNet® (An amazing lexical database of English)
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