trans-gresh'-un: From "transgress," to pass over or beyond; to overpass, as any rule prescribed as the limit of duty; to break or violate, as a law, civil or moral; the act of transgressing; the violation of a law or known principle of rectitude; breach of command; offense; crime; sin. In the Old Testament pesha`, occurs 80 times, rendered in all versions by "transgression." Its meaning is "rebellion"; see REBELLION . The word "rebellion" differs from this word in that it may be in the heart, though no opportunity should be granted for its manifestation: "An evil man seeketh only rebellion" (Pr 17:11). Here the wise man contemplates an evil heart, looking for an excuse or opportunity to rebel.
⇒See the definition of transgression in the KJV Dictionary
The New Testament uses parabasis, "trespass": "The law .... was added because of transgressions" (Ga 3:19); "Where there is no law, neither is there transgression" (Ro 4:15); "for the redemption of the transgressions that were under the first covenant" (Heb 9:15).
David Roberts Dungan