Source : Webster's Revised Unabridged Dictionary (1913)

Well-nigh \Well"-nigh`\, adv.
   Almost; nearly. --Chaucer.

Source : WordNet®

well-nigh
     adv : (of actions or states) slightly short of or not quite
           accomplished; `near' is sometimes used informally for
           `nearly' and `most' is sometimes used informally for
           `almost'; "the job is (just) about done"; "the baby was
           almost asleep when the alarm sounded"; "we're almost
           finished"; "the car all but ran her down"; "he nearly
           fainted"; "talked for nigh onto 2 hours"; "the
           recording is well-nigh perfect"; "virtually all the
           parties signed the contract"; "I was near exhausted by
           the run"; "most everyone agrees" [syn: {about}, {just
           about}, {almost}, {most}, {all but}, {nearly}, {near},
           {nigh}, {virtually}]