Entry Word: nut

Function: noun

Meaning: 1 a person of odd or whimsical habits <a show devoted to those lovable nuts who collect the weirdest things just for fun> — see eccentric
2 a person who lacks good sense or judgment <anyone who runs into traffic like that sure is a nut> — see fool 1
3 a person with a strong and habitual liking for something <a baseball nut whoʼs still waiting for the Boston Red Sox to win the World Series> — see fan
4 a person judged to be legally or medically insane <the man walking down the street talking to himself looked like a nut until we realized he was talking into his cell phone> — see lunatic 1