Frequency: The word is one of the 3000 most common words in English.
1.
Lost is the past tense and past participle of lose .
2.
If you are ~ or if you get ~, you do not know where you are or are unable to find your way.
Barely had I set foot in the street when I realised I was ~...
I took a wrong turn and we got ~ in the mountains.
ADJ: usu v-link ADJ
3.
If something is ~, or gets ~, you cannot find it, for example because you have forgotten where you put it.
...a ~ book...
My paper got ~...
He was scrabbling for his pen, which had got ~ somewhere under the sheets of paper.
ADJ
4.
If you feel ~, you feel very uncomfortable because you are in an unfamiliar situation.
Of the funeral he remembered only the cold, the waiting, and feeling very ~...
I feel ~ and lonely in a strange town alone.
ADJ: usu v-link ADJ
5.
If you describe a person or group of people as ~, you think that they do not have a clear idea of what they want to do or achieve.
They are a ~ generation in search of an identity.
ADJ
6.
If you describe something as ~, you mean that you no longer have it or it no longer exists.
...a ~ job or promotion...
The sense of community is ~...
The riots will also mean ~ income for Los Angeles County.
ADJ
7.
You use ~ to refer to a period or state of affairs that existed in the past and no longer exists.
He seemed to pine for his ~ youth...
...the relics of a ~ civilisation.
ADJ: ADJ n
8.
If something is ~, it is not used properly and is considered wasted.
Fox is not bitter about the ~ opportunity to compete in the Games...
The advantage is ~.
ADJ: usu v-link ADJ
9.
If advice or a comment is ~ on someone, they do not understand it or they pay no attention to it.
The meaning of that was ~ on me...
PHRASE: V inflects, PHR n