Longman Dictionary of Contemporary English - hill

~ n 1 an area of land that is higher than the land around it, like a mountain but smaller 2 a slope on a road  (There's a steep hill ahead - get into low gear.) 3 on the Hill AmE on capitol hill or in the US government 4 over the hill no longer young, and therefore no longer attractive or good at doing things  (Kathleen thinks she's over the hill, but she's only 32.) 5 it doesn't amount to a hill of beans AmE spoken it is not important