sign
英 [saɪn]
美[saɪn]
	    - n. 迹象;符号;记号;手势;指示牌
 - vi. 签署;签名
 - vt. 签署;示意
 
英英释意
- 1. a perceptible indication of something not immediately apparent (as a visible clue that something has happened);
 - "he showed signs of strain"
 - "they welcomed the signs of spring"
 
- 2. a public display of a (usually written) message;
 - "he posted signs in all the shop windows"
 
- 3. any communication that encodes a message;
 - "signals from the boat suddenly stopped"
 
- 4. structure displaying a board on which advertisements can be posted;
 - "the highway was lined with signboards"
 
- 5. (astrology) one of 12 equal areas into which the zodiac is divided
 
- 6. (medicine) any objective evidence of the presence of a disorder or disease;
 - "there were no signs of asphixiation"
 
- 7. having an indicated pole (as the distinction between positive and negative electric charges);
 - "he got the polarity of the battery reversed"
 - "charges of opposite sign"
 
- 8. an event that is experienced as indicating important things to come;
 - "he hoped it was an augury"
 - "it was a sign from God"
 
- 9. a gesture that is part of a sign language
 
- 10. a fundamental linguistic unit linking a signifier to that which is signified;
 - "The bond between the signifier and the signified is arbitrary"--de Saussure
 
- 11. a character indicating a relation between quantities;
 - "don't forget the minus sign"