any disease of the mind; the psychological state of someone who has emotional or behavioral problems serious enough to require psychiatric intervention
an acute viral disease of the nervous system of warm-blooded animals (usually transmitted by the bite of a rabid animal); rabies is fatal if the virus reaches the brain
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"
a public display of a (usually written) message; "he posted signs in all the shop windows"
a character indicating a relation between quantities; "don't forget the minus sign"
a gesture that is part of a sign language
a fundamental linguistic unit linking a signifier to that which is signified; "The bond between the signifier and the signified is arbitrary"--de Saussure
(medicine) any objective evidence of the presence of a disorder or disease; "there were no signs of asphyxiation"
be engaged by a written agreement; "He signed to play the casino on Dec. 18"; "The soprano signed to sing the new opera"
communicate in sign language; "I don't know how to sign, so I could not communicate with my deaf cousin"
mark with one's signature; write one's name (on); "She signed the letter and sent it off"; "Please sign here"
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"
place signs, as along a road; "sign an intersection"; "This road has been signed"
engage by written agreement; "They signed two new pitchers for the next season"
approve and express assent, responsibility, or obligation; "All parties ratified the peace treaty"; "Have you signed your contract yet?"
a fertilizer that is derived from animal or vegetable matter
involving or affecting physiology or bodily organs; "an organic disease"
simple and healthful and close to nature; "an organic lifestyle"
relating or belonging to the class of chemical compounds having a carbon basis; "hydrocarbons are organic compounds"
being or relating to or derived from or having properties characteristic of living organisms; "organic life"; "organic growth"; "organic remains found in rock"
of or relating to foodstuff grown or raised without synthetic fertilizers or pesticides or hormones; "organic eggs"; "organic vegetables"; "organic chicken"
of or relating to or derived from living organisms; "organic soil"
acute contagious infection caused by the bacterium Corynebacterium diphtheriae; marked by the formation of a false membrane in the throat and other air passages causing difficulty in breathing