Lost (?), a. [Prop. p. p. of OE.
losien. See Lose, v. t.]
1. Parted with unwillingly or unintentionally;
not to be found; missing; as, a lost book or sheep.
2. Parted with; no longer held or possessed;
as, a lost limb; lost honor.
3. Not employed or enjoyed; thrown away;
employed ineffectually; wasted; squandered; as, a lost day; a
lost opportunity or benefit.
5. Having wandered from, or unable to find,
the way; bewildered; perplexed; as, a child lost in the woods;
a stranger lost in London.
6. Ruined or destroyed, either physically or
morally; past help or hope; as, a ship lost at sea; a woman
lost to virtue; a lost soul.
7. Hardened beyond sensibility or recovery;
alienated; insensible; as, lost to shame; lost to all
sense of honor.
8. Not perceptible to the senses; no longer
visible; as, an island lost in a fog; a person lost in
a crowd.
9. Occupied with, or under the influence of,
something, so as to be insensible of external things; as, to be
lost in thought.
Lost motion (Mach.), the difference
between the motion of a driver and that of a follower, due to the
yielding of parts or looseness of joints.