Adverb : The raiders crouched low in the bushes. ,The plane flew low. ,Some live low while others live high. She swore she would bring him low. ,The gas in the tank is running low. ,to buy something low and sell it high. ,to turn the radio low; lights turned down low.    From Dictionary.com. 

Noun : numerous marshy lows in the forest; the recent low in the stock market. ,a new low in tastelessness.    From Dictionary.com.