hills /hɪlz/noun 1phrases 5 noun1 •A region in which there are many hills; a hilly area.He lived in the hills, far from civilisation. Phrases with hills gold in them thar hillsAn opportunity for something to be profitable or beneficial. head for the hillsTo travel to a higher elevation, especially to a rural region on vacation. old as the hillsExtremely old. run for the hillsTo flee. take to the hillsTo flee or vanish; to run away.