1. A transgression of a religious or moral law, especially when deliberate.
2. Theology.
   1. Deliberate disobedience to the known will of God.
   2. A condition of estrangement from God resulting from such disobedience.
3. Something regarded as being shameful, deplorable, or utterly wrong.

1. To violate a religious or moral law.
2. To commit an offense or violation.

[Middle English sinne, from Old English synn.]

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.