furthest

alternative farthest · alternative further

1. superlativesuperlative form of far: most far
   1. Most distant in time, space or degree.

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

      1 more example

      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.

      2022 November 30, Paul Bigland, “Destination Oban: a Sunday in Scotland”, in RAIL, number 971, page 79

alternative farthest · alternative further

1. superlative form of far: most far
   1. To, at or over the greatest distance in space, time or other extent.

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

      2 more examples

      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.

      1958 July 28, J. P. Wilson, “Scottish Soliloquy”, in Railway Magazine, page 495

   2. To the greatest degree or extent.

      This civilisation was the furthest advanced.