1. (Physiology) the faculty or sense by which sound is perceived. 2. an opportunity to be listened to. 3. (General Physics) the range within which sound can be heard; earshot. 4. (Law) the investigation of a matter by a court of law, esp the preliminary inquiry into an indictable crime by magistrates. 5.
The grey hair ârule of thumbâ is that by the age of 50, half of the population have lost the colour in 50% of their hair. When researchers tested this rule, they found that 74% of people aged between 45 and 65 had grey hair, with an average intensity of 27%. Generally, men have more grey hair than women.
Differs widely per person, but I would guess the average to be around 35. But my hair started turning gray at age 18! I've had to dye it ever since. Even though my parents and siblings didn't go gray for a long time after that, like closer to 36, 38.But I had a really bad case of Mono, and my hair started turning gray when I was sick, so maybe that had something to do with it.ven though my parents and siblings didn't go gray for a long time after that, like closer to 36, 38. But I had a really bad case of Mono, and my hair started turning gray when I was sick, so maybe that had something to do with it.