n.

1. 音，音色，音调[C]
   The teacher is speaking in a high tone.

   教师正在大声说话。

2. 腔调，语气[C]
   He spoke in a tone of command.

   他用命令的口吻说话。

3. 声调，语调[C]
   Mandarin Chinese has four tones.

   汉语有四声。

4. 色调；光度[C]
   She used several tones of blue to make the sky look real.

   她用了数种蓝色色调让天空看起来真实些。

5. 风气，气氛[the S]
   The tone of the school is excellent.

   这所学校校风极好。

6. （身心的）正常状态[U]
7. 【音】全音；调音；调整（画、照片等的）色调

vt.

1. 用某种调子说；装腔作势地说
2. 给……定调子；给（乐器）定音调；给（画）定色调
3. 使变调子
   Excitement toned her voice.

   激动使她的嗓音都变了。

4. 增强，提高[（+up）]
   These exercises will tone up your muscles.

   这些运动方式会强健你的肌肉。

5. 【摄】给……上色

vi.

1. 呈现悦目色调
2. 颜色调和（或和谐）[（+with）]

n.

1. a musical or vocal sound with reference to its pitch, quality, and strength.
   ▸a musical note, warble, or other sound used as a signal on a telephone or answering machine.
2. a modulation of the voice expressing a feeling or mood.
3. general character:
   trust her to lower the tone of the conversation.
4. (also whole tone) a basic interval in classical Western music, equal to two semitones and separating, for example, the first and second notes of an ordinary scale; a major second.
5. the particular quality of brightness, deepness, or hue of a colour.
   ▸the general effect of colour or of light and shade in a picture.
6. Phonetics  (in some languages, such as Chinese) a particular pitch pattern on a syllable used to make semantic distinctions.
   ▸(in some languages, such as English) intonation on a word or phrase used to add functional meaning.
7. (also muscle tone) the normal level of firmness or slight contraction in a resting muscle.

v.

1. (often tone something up) give greater strength or firmness to (the body or a muscle).
2. (tone something down) make something less harsh in colour.
   ▸make something less extreme.
3. (tone with) harmonize with in terms of colour.
4. Photography  give (a monochrome picture) an altered colour in finishing by means of a chemical solution.