furthest

• farthest (See also usage notes at further.)

• IPA^(key): /ˈfɜː(ɹ)ðɪst/

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furthest

1. superlative 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.

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

        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.

furthest

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.

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

   2. To the greatest degree or extent.

      This civilisation was the furthest advanced.