3. sign a motion or gesture used to express or convey information, an idea, etc.
4. sign an inscribed board, placard, or the likebearing a warning, advertisement, or other information and displayed for public view: a traffic sign; a store sign.
5. sign a trace; vestige: There wasn't a sign of them.
6. sign Usu., signs. traces, as footprints, of a wildanimal.
10. sign any meaningful gestural unit belonging to a sign language.
11. sign a symbol, as + or =, used to indicate a mathematical operation or relation.
12. (v.t.)sign to affix a signature to: to sign a letter.
13. sign to write as a signature: to sign one's name.
14. sign to engage or hire by written agreement (often fol. by on or up): to sign a basketball player.
15. sign to mark with a sign, esp. the sign of the cross.
16. sign to communicate by means of a sign; signal.
17. sign to convey (a message) in a sign language.
18. (v.i.)sign to write one's signature, as a token of agreement, receipt, etc.
19. sign to make a sign or signal.
20. sign to employ a sign language for communication.
21. sign to obligate oneself by signature.
22. sign sign away or over, to assign or dispose of by affixing one's signature to a document.
23. sign sign in (or out), to record one's arrival (or departure) by signing a register.
24. sign sign off,
25. sign to cease radio or television broadcasting, esp. at the end of the day.
26. sign to indicate one's approval explicitly if not formally.
27. sign sign up, to enlist, as in an organization or group.
Etymology: (1175–1225; (n.) ME signe < OF < L signum mark, sign, image; (v.) ME signen < OF signer < L signāre, der. of signum)
Definition of 'Sign'
Princeton's WordNet
1. (noun)sign, mark 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. (noun)sign a public display of a message "he posted signs in all the shop windows"
3. (noun)signal, signaling, sign any nonverbal action or gesture that encodes a message "signals from the boat suddenly stopped"
4. (noun)signboard, sign structure displaying a board on which advertisements can be posted "the highway was lined with signboards"
5. (noun)sign of the zodiac, star sign, sign, mansion, house, planetary house (astrology) one of 12 equal areas into which the zodiac is divided
6. (noun)sign (medicine) any objective evidence of the presence of a disorder or disease "there were no signs of asphyxiation"
7. (noun)polarity, sign having an indicated pole (as the distinction between positive and negativeelectric charges) "he got the polarity of the battery reversed"; "charges of opposite sign"
8. (noun)augury, sign, foretoken, preindication an event that is experienced as indicating important things to come "he hoped it was an augury"; "it was a sign from God"
10. (noun)sign 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. (adj)sign a character indicating a relation between quantities "don't forget the minus sign"
12. (verb)gestural, sign(a), signed, sign-language(a) used of the language of the deaf
13. (verb)sign, subscribe mark with one's signature; write one's name (on) "She signed the letter and sent it off"; "Please sign here"
14. (verb)sign, ratify approve and express assent, responsibility, or obligation "All parties ratified the peace treaty"; "Have you signed your contract yet?"
15. (verb)sign be engaged by a written agreement "He signed to play the casino on Dec. 18"; "The soprano signed to sing the new opera"
16. (verb)sign, contract, sign on, sign up engage by written agreement "They signed two new pitchers for the next season"
17. (verb)sign, signal, signalize, signalise communicate silently and non-verbally by signals or signs "He signed his disapproval with a dismissive hand gesture"; "The diner signaled the waiters to bring the menu"
18. (verb)sign place signs, as along a road "sign an intersection"; "This road has been signed"
19. (verb)sign communicate in signlanguage "I don't know how to sign, so I could not communicate with my deaf cousin"
1. (noun)sign an indication that sth is happening, is true, etc. There was no sign of rain.; a sign of his love for her
2. sign a notice with a name or information on it a road sign; Did you read the sign in the window?
3. sign a signal When you're ready to leave make a sign to me and we'll go.
4. sign a written symbol What's the sign that means "multiply?"
5. sign a starsign "What's your sign?" "I'm a Virgo."
6. (verb)sign to write your name on sth to approve or show that you wrote it He signed the letter "James Madison."; Sign the form and return it.; Where should I sign?
7. (noun)Sign a motion, an action, or a gesture by which a thought is expressed, or a command or a wish made known
8. (noun)Sign hence, one of the gestures of pantomime, or of a language of a signs such as those used by the North American Indians, or those used by the deaf and dumb
9. (noun)Sign a militaryemblem carried on a banner or a standard
10. (noun)Sign a lettered board, or other conspicuous notice, placed upon or before a building, room, shop, or office to advertise the businessthere transacted, or the name of the person or firm carrying it on; a publicly displayed token or notice
13. (noun)Sign an objectiveevidence of disease; that is, one appreciable by some one other than the patient
14. (noun)Sign any character, as a flat, sharp, dot, etc
15. (noun)Sign that which, being external, stands for, or signifies, something internal or spiritual; -- a term used in the Church of England in speaking of an ordinance considered with reference to that which it represents
16. (noun)Sign to represent by a sign; to make known in a typical or emblematic manner, in distinction from speech; to signify
Definitions of Sign 
Afrikaans: teken
Arabic: علامَه، رَمْز
Bulgarian: символ
Brazilian: sinal
Czech: znak, znaménko
German: das Zeichen
Danish: tegn; symbol
Greek: σημείο, σύμβολο
Spanish: señal
Estonian: märk
Farsi: نشانه
Finnish: merkki
French: signe
Hebrew: סִימָן
Hindi: चिह्न
Croatian: znak, simbol
Hungarian: jel
Indonesian: lambang
Icelandic: tákn
Italian: segno
Japanese: 記号
Korean: 기호
Lithuanian: ženklas
Latvian: zīme
Malay: tanda
Dutch: teken
Norwegian: tegn
Polish: znak
Persian: نشانه
Pashto: نښه، رمز، سمبول: اشاره، ز
Portuguese: sinal
Romanian: simbol
Russian: знак
Slovak: znak, znamienko
Slovenian: znamenje
Serbian: znak
Swedish: tecken, symbol
Thai: สัญลักษณ์
Turkish: işaret sembol
Taiwanese: 符號
Ukrainian: знак, символ
Urdu: علامت
Vietnamese: dấu hiệu, kí hiệu
Chinese: 符号
