1. 完美;盡善盡美
She played the music to perfection.
她把這支樂曲演奏得完美無缺。
2. 完善;完成[(+of)]
In practice, this degree of perfection has not yet been achieved.
實際上，尚未達到這樣的完善程度。
3. 完美的人(或事)
She aims for perfection.
她力求成為壹個完美的人
下面再來看下牛津高階英語詞典中的解釋，用漢語解釋幾個相近意義英文單詞解釋的不是很明白 用英文解釋其中的區別很明顯
perfection
noun
[U, sing.] the state of being perfect: technical / physical perfection ◆ The fish was cooked to perfection. ◆ The novel achieves a perfection of form that is quite new. ◆ His performance was perfection (= sth perfect).完美（的狀態）
[U, sing.] the act of making sth perfect by doing the final improvements: They have been working on the perfection of the new model.（通過改進行動使）完善、完美
perfectness
這個單詞在很多字典中找不到，說明這可能是個新詞 就像漢語也經常有新詞誕生 像“下崗”，10幾年前在漢語詞典是查不這個說法的
但在壹些地方也可以找到這個詞的蹤跡
看壹下GOOGLE網絡定義
The quality of being perfect; perfection
這個解釋說明perfection和perfectness是同壹的
再看幾個例句
perfectness ratio of plant
設備完好率
Dalloway", "To the Lighthouse" and "The Waves", a development of complication, perfectness and artistry in wholeness construction can be traced.
從《雅各的房間》、《達洛衛夫人》、《到燈塔去》和《海浪》，可以發現壹種對整體感越來越復雜、越來越完美、越來越藝術化的追求軌跡。
The refactoring promotes the discovering, verification, more wide application of the design patterns and the continuing improvement and perfectness of the framework.
重構促進了設計模式的發現和驗證,以及更廣泛的應用,促進了框架不斷的改進,不斷的趨於完善。
The efficiency of rural cooperative financial system is crucial for the perfectness, function and competitiveness strengthening of rural financial system.
農村合作金融制度效率是事關農村金融制度健全 ,功能發揮 ,競爭力增強的重要問題。
The process of setting-up the individual network station should cover five basic steps as follows: applying for the home page, applying for duty-free name, making home page, homepage convey, network station publication and perfectness.
個人網站的建立過程應包含:申請主頁空間、申請免費域名、制作主頁、主頁上傳、網站宣傳與完善5個基本步驟。
He says, only when his works are appreciated by others, can his life attain its brilliance. Everyone’s aspiration is none other than achieving perfectness.
他說，只有他的作品讓人欣賞了，他的生活才會燦爛,每個人想的不過是追求完美而己。
In recent years,Dalian has exploited the whole city as tourist resources,and raised the consciousness of perfectness and specialty.
多年來 ,大連將整座城市作為旅遊資源綜合開發 ,強調精品意識 ,重在出特品 ,成功地闖出了“大連”品牌。
Col. 3:14 And over all these things put on love, which is the uniting bond of perfectness.
西三14在這壹切之上，還要穿上愛，愛是全德的聯索。
It divides the twenty years of the theory of test data selection into three periods formation period, development period, perfectness period, gives representive research results and characters of each period, and discusses the application of the theory in software engineering.
本文將測試數據選擇理論發展的20年劃分成3個階段——形成階段、發展階段、完善階段，給出了每壹階段具有代表性的研究成果和特點，討論了此理論在軟件工程中的應用
比較很難發現2詞的區別
所以這裏給出壹個本人的意見，僅僅代表我個人意見：這個詞沒有區別 就好像美麗和漂亮 很難說什麽時候用美麗什麽時候用漂亮 如果妳是做詞匯題遇到了選項中有這2個單詞 那我只能說出題人肯定是個中國人 而且是個變態 而且現在正在為自己出了這個壹個有”水平“的題而暗喜呢 如果妳是為了學習英語語言為了應用 估計這2個詞混用不會有什麽錯誤