noun - the currency used in the USA or Australia etc.

noun, American English - the floor of a building nearest to the ground

noun - (especially with the definite article) the absence of light

noun - the act of looking each other in the eye

noun - the part of something that is opposite the front

noun - the line marking the border of a playing field

noun - the theory or the technique of printing books etc.

noun - the study of the surface of a particular region

noun - the person who designs the moves in a dance

noun - a person who studies the atmosphere and the weather

noun - the doctor whose specialty treating the glands secreting hormones

adjective - earliest, the one that was there at the beginning

adjective - closest; the one that is the shortest distance away

noun - the dark part that sticks out from the breast

determiner - not one or the other, none of the two