Synonyms for lost

modified

1. Not to be found

   misplaced, mislaid, invisible, cast away, missing, hidden, obscured, gone astray, nowhere to be found, strayed, lacking, wandered off, forfeited, vanished, wandering, minus, without, gone out of one's possession; see also absent, gone 2.

   Antonyms found*, come back, returned.

2. Ignorant of the way

   disoriented, perplexed, bewildered, ignorant; see doubtful 2.

3. Destroyed

   demolished, devastated, wasted; see destroyed, ruined 1.

4. No longer to be gained

   gone, passed, costly; see destroyed, ruined 1, unprofitable 1.

5. Helpless

   feeble, sickly, disabled; see weak 1, 3.

get lost*