def:sufficiently significant to affect the whole world, ex: it need not be earth-shattering.but it should be somenthing that mattered greatly to you
def: very expensive, ex: this dress cost the earth
def: in the world, ex: What on earth is he doing with a spade?
def: global, universal, ex: mc donald's is a worldwide enterprise
def: a lot of time, ex: I have finished my studies. I have all time in the world now.
def: amazing, unbelievable, ex: the show was out of this world
def: to hold something or someone in very high esteem, ex: She thinks the world of her adviser
def: extremely happy, ex: I am in the top of the world because I won the lotery!
def: any of the boards composing a floor, ex: the floorboards of my house are very old
def: the subterranean part of the sea, ex: the ocean floor looks like mountains
def: a place for to dance, ex: we want to have a dance floor in our house
def: to be realistic, ex: now, with your baby, you have to keep your feet on the ground
def: very sad, ex: I am grounded about killing animals
def: start something, ex: The play never got off the ground