According to Occam's razor, all other things being equal, the simplest theory is the most likely to be true. In the context of human lifestyle, simplicity can denote freedom from hardship, effort or confusion. Specifically, it can refer to a simple living style.
https://en.wikipedia.org/wiki/Simplicity
2. The state of being not complex, or of consisting of few parts; as the simplicity of a machine. 3. Artlessness of mind; freedom from a propensity to cunning or stratagem; freedom from duplicity; sincerity. Marquis Dorset, a man for his harmless simplicity neither misliked nor much regarded. 4. Plainness; freedom from artificial ornament; as the simplicity of a dress, of style, of language, &c. Simplicity in writing is the first or excellences. 5. Plainness; freedom from subtilty or abstruseness; as the simplicity of scriptural doctrines or truth. 6. Weakness of intellect; silliness. Godly simplicity, in Scriptures, is a fair open profession and practice of evangelical truth, with a single view to obedience and to the glory of God.
http://av1611.com/kjbp/kjv-dictionary/simplicity.html
There are several ways to achieve simplicity in a photograph. The most obvious (and easiest) form is to place the subject against a neutral background like a backdrop or the sky. Backgrounds can be entirely neutral, like a solid backdrop or a cloudless sky; or they can complement the image, like a starfish on the sand.
https://en.wikipedia.org/wiki/Simplicity_(photography)
simplicity noun [U] (NATURAL). › the ​fact that something is ​ordinary, ​traditional, or ​natural, and not ​complicated: The ​old ​people ​led a ​life of ​great simplicity (= with few possessions and little ​money).
http://dictionary.cambridge.org/dictionary/english/simplicity
Simplicity is the state or quality of being simple. Something which is easy to understand or explain seems simple, in contrast to something complicated. Alternatively, as Herbert A. Simon suggests, something is simple or complex depending on the way we choose to describe it.
https://en.wikipedia.org/wiki/Simplicity
› the ​quality of being ​easy to ​understand or do: A ​flat ​tax has the ​virtue of simplicity, but I ​question how ​fair it would be. › the ​quality of being ​plain, without ​unnecessary or ​extra things or ​decorations: What ​fascinated us was the simplicity and ​usefulness of the ​design.
http://dictionary.cambridge.org/dictionary/english/simplicity
SIMPLICITY. sim-plis'-i-ti (pethayyuth; haplotes): The words in the Old Testament commonly translated simplicity are pethi, simple (Proverbs 1:22), pethayyuth, simplicity (9:13 margin), tom, completeness, integrity (2 Samuel 15:11), They went in their simplicity..
http://www.biblestudytools.com/dictionary/simplicity/
simplicity noun [U] (EASY). C1 the ​fact that something is ​easy to ​understand or do: The ​advantage of the ​plan is ​its simplicity. The ​test was simplicity itself (= very ​easy). More examples. 1  I ​ prefer the second ​ option - ​ its ​ advantages are simplicity and ​ cheapness.
http://dictionary.cambridge.org/dictionary/english/simplicity
In such simplicity--openness, sincerity, freedom from double-mindedness--man most resembles God and is most open to His visitation and blessing.
http://www.biblestudytools.com/dictionary/simplicity/
In this field, a distinction is often made between two senses of simplicity: syntactic simplicity (the number and complexity of hypotheses), and ontological simplicity (the number and complexity of things postulated). These two aspects of simplicity are often referred to as elegance and parsimony respectively.
https://en.wikipedia.org/wiki/Simplicity
the meaning of simplicity
Simplicity means the state or quality of being simple. The meaning of simplicity is the state or quality of being simple.