furthest

adj

1. (form-of, superlative)superlative form of far: most far
2. superlative form of far: most far

   “The furthest known galaxy is about 13 billion light years from Earth.”

   “Sitting on the dockside at Oban, watching the to-ing and fro-ing in the harbour on a perfect summer's eve, I reflect on a trip which has taken me through our busiest cities to traverse the country's main lines, as well as explore some of the furthest extremities that were literally out on a limb.”

adv

1. superlative form of far: most far

   “Of all the children in our school, I can run furthest.”

   “He lives furthest from the office, so his commute is the longest.”

   “The native-born and the "naturalised" locomotives have been giving way to the standardised types, of which the L.M.S.R. class "5" 4-6-0 has led the way and has penetrated the furthest.”

2. superlative form of far: most far

   “This civilisation was the furthest advanced.”