Simple Definition of lost
: unable to be found
: not knowing where you are or how to get to where you want to go : unable to find your way
: no longer held, owned, or possessed
Full Definition of lost
1 : not made use of, won, or claimed
2 a : no longer possessed b : no longer known
3 : ruined or destroyed physically or morally : desperate
5 a : unable to find the way b : no longer visible c : lacking assurance or self-confidence : helpless
7 : not appreciated or understood : wasted <their jokes were lost on me>
8 : obscured or overlooked during a process or activity <lost in translation>
Examples of lost in a sentence
He was looking for his lost keys.
Many have tried to find the ruins of the lost city.
We took a wrong turn and got lost.
Hold my hand. I don't want you to get lost.
He has been trying to recapture his lost youth.
The original music is lost to us forever.
Origin of lost
past participle of lose
First Known Use: 15th century
LOST Defined for Kids
Definition of lost for Students
1 : unable to find the way <a lost puppy>
2 : unable to be found <lost luggage>
3 : not used, won, or claimed <a lost opportunity>
4 : no longer possessed or known <a lost art> <long lost cousins>
5 : fully occupied <lost in thought>
6 : not capable of succeeding <a lost cause>
Legal Definition of lost
1 : not made use of, won, or claimed <lost opportunity costs>
2 : unintentionally gone out of or missing from one's possession or control
3 : ruined or destroyed physically; also : in an unknown physical condition or location <a lost ship>
Seen and Heard
What made you want to look up lost? Please tell us where you read or heard it (including the quote, if possible).