symbol, badge, sign, signal, mark, token, attribute, emblem

名詞 sign:

1. a perceptible indication of something not immediately apparent (as a visible clue that something has happened)
   同義詞：mark
2. a public display of a (usually written) message
3. any communication that encodes a message
   同義詞：signal, signaling
4. structure displaying a board on which advertisements can be posted
   同義詞：signboard
5. (astrology) one of 12 equal areas into which the zodiac is divided
   同義詞：sign of the zodiac, star sign, mansion, house, planetary house
6. (medicine) any objective evidence of the presence of a disorder or disease
7. having an indicated pole (as the distinction between positive and negative electric charges)
   同義詞：polarity
8. an event that is experienced as indicating important things to come
   同義詞：augury, foretoken, preindication
9. a gesture that is part of a sign language
10. a fundamental linguistic unit linking a signifier to that which is signified--de Saussure
11. a character indicating a relation between quantities

動詞 sign:

1. mark with one's signature; write one's name (on)
   同義詞：subscribe
2. approve and express assent, responsibility, or obligation
   同義詞：ratify
3. be engaged by a written agreement
4. engage by written agreement
   同義詞：contract, sign on, sign up
5. communicate silently and non-verbally by signals or signs
   同義詞：signal, signalize, signalise
6. place signs, as along a road
7. communicate in sign language
8. make the sign of the cross over someone in order to call on God for protection; consecrate
   同義詞：bless

形容詞 sign:

1. used of the language of the deaf
   同義詞：gestural, signed, sign-language

1. Just sign on the dotted line and the car is yours.
   你只需簽署這份文件，這輛汽車就是你的了。
2. Arsenal have just signed a new striker.
   阿塞納爾隊剛雇用了一名新前鋒。
3. The football team has signed two new players.
   該足球隊已簽約聘用了兩名新隊員。
4. She signed her name to the document.
   她在文件上簽了名。
5. Dark clouds are a sign of rain or snow.
   烏云是雨或雪將至的預兆。