The difference between Acceptance and Approval

Acceptance as a noun:

The act of accepting; a receiving of something offered, with acquiescence, approbation, or satisfaction; especially, favourable reception; approval.

Acceptance as a noun:

Belief in something; agreement, assent.

Acceptance as a noun:

The state of being accepted.

Acceptance as a noun:

The usual or accepted meaning of a word or expression.

Acceptance as a noun (business, finance):

An assent and engagement by the person on whom a bill of exchange is drawn, to pay it when due according to the terms of the acceptance; the bill of exchange itself when accepted.

Acceptance as a noun (law):

An agreeing to the action, proposals, or terms of another by some act which results in the conclusion of a legally binding contract; the reception or taking of a thing bought as that for which it was bought, or as that agreed to be delivered, or the taking of possession of a thing as owner.

Acceptance as a noun (government, US):

The act of an authorized representative of the government by which the government assents to ownership of existing and identified supplies, or approves specific services rendered, as partial or complete performance of a contract.

Acceptance as a noun (horse racing, Australia, New Zealand, pluralonly):

A list of horses accepted as starters in a race.

Acceptance as a noun (optics):

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Approval as a noun:

An expression granting permission; an indication of agreement with a proposal; an acknowledgement that a person, thing or event meets requirements.

Approval as a noun:

An expression of favorable acceptance and encouragement; a compliment that also condones.

Approval as a noun (especially, philately):

Something mailed by a seller to a collector to match his stated interests; he can approve of or return the item.