Cases of word usage

1) farthest inside; most private or secret (innermost)

2) the Roman god of the sea; one of the farthest planets of the solar system (neptune)

3) the planet farthest from the Sun (pluto)

4) either time (summer solstice, the longest day, about 21 June; winter solstice, the shortest day, about 21 December in the northern parts of the world) when the sun is farthest North or South of the equator (solstice)

5) farthest west (westernmost)