hairful adjective 1noun 1forms 3 adjective1 •Characterised by fullness of hair; hairy.In appearance he is a hairful gnome, born to ghost the fringes of rock and roll culture. — 2010 noun1 •The amount (of hair) typical in a head of hair.Largely because you've now got a hairful of finely sprayed boiling hot musician's shit. — 2008 formshairfuls · more hairful · most hairful