Here are the definitions for "sin", "marriage", and "God" taken from the 1828 edition of Webster's Dictionary:
Sin: The voluntary departure of a moral agent from a known rule of rectitude or duty, prescribed by God; any voluntary transgression of the divine law, or violation of a divine command; a wicked act; iniquity. Sin is either a positive act in which a known divine law is violated, or it is the voluntary neglect to obey a positive divine command, or a rule of duty clearly implied in such command. Sin comprehends not action only, but neglect of known duty, all evil thoughts purposes, words and desires, whatever is contrary to God's commands or law.
* A sin-offering; an offering made to atone for sin.
Marriage: The act of uniting a man and woman for life; wedlock; the legal union of a man and woman for life. Marriage is a contract both civil and religious, by which the parties engage to live together in mutual affection and fidelity, till death shall separate them. Marriage was instituted by God himself for the purpose of preventing the promiscuous intercourse of the sexes, for promoting domestic felicity, and for securing the maintenance and education of children.
God: The Supreme Being; the eternal and infinite Spirit, the Creator, and Sovereign of the universe; Jehovah. God is a spirit, infinite in power, wisdom, and goodness; the maker and preserver of all things both visible and invisible. He is represented as a being of infinite holiness, justice, and benevolence, who is infinitely worthy of adoration, obedience, and love.
Here are the definitions of "Sin," "Marriage," and "God" from Merriam-Webster Dictionary:
an offense against religious or moral law
a transgression of the law of God
a vitiated state of human nature in which the self is estranged from God
the state of being united as spouses in a consensual and contractual relationship recognized by law
the act of entering into such a relationship
an intimate or close union
the supreme or ultimate reality as the Being perfect in power, wisdom, and goodness who is worshipped as creator and ruler of the universe
a being or object believed to have more than natural attributes and powers and to require human worship
one controlling or dominating a particular sphere of activity or aspect of life
Definitions over the years have changed in Dictionaries, but The Word of God has changed not.