- existing in or caused by nature; not made or caused by humankind大自然的; 自然的, 非人为的：
carrots contain a natural antiseptic which fights bacteria
胡萝卜含有一种天然的抗菌剂
natural disasters such as earthquakes.
地震之类的自然灾害。
- having had a minimum of processing or preservative treatment经最低限度加工的; 经最低限度防腐处理的; 天然的：
natural food
天然食物
our nutritional products are completely natural.
我们的营养品是纯天然的。
- (of fabric) having a colour characteristic of the unbleached and undyed state; off-white, creamy-beige（织物）原色的; 本白色的。
- of or in agreement with the character or make-up of, or circumstances surrounding, someone or something天性的, 固有的; 天然的：
sharks have no natural enemies.
鲨鱼没有天敌。
- attrib.(of a person) born with a particular skill, quality, or ability（人）天生的, 固有的：
he was a natural entertainer.
他天生就是个演员。
- (of a skill, quality, or ability) coming instinctively to a person; innate（技巧、品质或能力）天赋的, 生就的：
writing appears to demand muscular movements which are not natural to children.
写字看来需要肌肉运动, 小孩并非生来就会。
- (of a person or their behaviour) relaxed and unaffected; spontaneous（人, 举止）轻松自如的; 自然的：
he replied with just a little too much nonchalance to sound natural.
他的回答过于冷淡了些, 听上去不那么自然。
- occurring as a matter of course and without debate; inevitable自然如此的; 必然的：
on giving up as a player, Ken was a natural choice for chairman.
肯刚放弃做球员就成了主席的最佳人选。
- attrib.(of law or justice) based on innate moral sense; instinctively felt to be right and fair（法律, 司法）基于固有道德感、是非感和公平感的, 自然的。参见NATURAL LAW.
- Bridge (of a bid) straightforwardly reflecting one's holding of cards【桥牌】（叫牌）自然叫的, 实叫的。常与CONVENTIONAL或ARTIFICIAL相对。
- attrib.(of a parent or child) related by blood（父母, 子女）有血缘关系的：
such adopted children always knew who their natural parents were.
如此收养的孩子全知道自己的生身父母是谁。
- chiefly archaic illegitimate〈主古〉私生的：
the Baron left a natural son by his mistress.
男爵留下了一个与情妇所生的私生子。
- Music (of a note) not sharpened or flattened【乐】（音符）本位的：
the bassoon plays G natural instead of A flat.
低音管奏出的是G本位音而不是A降半音。
- (of a brass instrument) having no valves and able to play only the notes of the harmonic series above a fundamental note（铜管乐器）无键（或孔）的。
- of or relating to the notes and intervals of the harmonic series（与）泛音列音符和间隔（有关）的。
- Christian Theology relating to earthly or unredeemed human or physical nature as distinct from the spiritual or supernatural realm【基督教神学】物质世界的, 非精神的。
- a person regarded as having an innate gift or talent for a particular task or activity有天生才能者：
she was a natural for the sort of television work required of her.
要她做电视台工作再好不过了, 她是这方面的天才。
- a thing that is particularly suited for something适合的事物：
a nice wide hall is a natural for dining.
一个宽阔美观的大厅自然适合用餐。
- Music a sign（） denoting a natural note when a previous sign or the key signature would otherwise demand a sharp or a flat 【乐】本位音记号。
- a natural note本位音。
- any of the longer, lower keys on a keyboard instrument that are normally white白键。
- a creamy beige colour原色, 本色。
- a hand of cards, throw of dice, or other result which wins immediately, in particular（纸牌、掷骰子中）最好的组合, 尤指：
- a hand of two cards making 21 in the first deal in blackjack and similar games（21点纸牌中）第一次发牌头两张就得21点。
- a first throw of 7 or 11 at craps掷双骰子时掷出7(或11)点。
- Fishing an insect or other small creature used as bait, rather than an artificial imitation【渔】（用昆虫或其他生物做成的）天然鱼饵。
- archaic, offensive a person mentally handicapped from birth〈古, 冒犯〉弱智; 白痴。
- informal or dialect naturally〈非正式或方〉自然地：
keep walking - just act natural.
继续走——表现得自然些。