The written approval of the buyer's offer by the seller.

Acceptance is a person's agreement to experience a situation, to follow a process or condition (often a negative or uncomfortable situation) without attempting to change it, protest, or exit. Acceptance as a concept appears in human psychology. Psychological treatments often suggest the path of acceptance when a situation is both disliked and unchangeable, or when change may be possible only at great cost or risk. Acceptance may imply only a lack of outward, behavioral attempts at possible change, but the word is also used more specifically for a felt or hypothesized cognitive or emotional state.

The term acceptance is defined as a noun, in which it shows to have three different meanings. The first is known as the act of taking or receiving something offered. For example, if someone is giving you a gift and you receive it, then that person has accepted the gift; therefore, having acceptance. Another definition of acceptance has to deal with positive welcome; favor and endorsement. In which, a person could like someone and, have acceptance for them due to their approval of that person.

Acceptance – β€œAn express act or implication by conduct that manifests assent to the terms of an offer in a manner invited or required by the offer so that a binding contract is formed. The exercise of power conferred by an offer by performance of some act. The act of a person to whom something is offered of tendered by another, whereby the offered demonstrates through an act invited by the offer an intention of retaining the subject of the offer. ” (Chirelstein, 2001)This definition overlaps with the definition of the quality tolerance.

Acceptance and tolerance are not synonyms. E. Tolle (Power of Now, etc) defines acceptance as a "this is it" response to anything occurring in any moment of life. There, strength, peace and serenity are available when one stops struggling to resist, or hang on tightly to what is so in any given moment. What do I have right now? Now what I am I experiencing? The point is, can one be sad when one is sad, afraid when afraid, silly when silly, happy when happy, judgmental when judgmental, overthinking when overthinking, serene when serene, etc.