简要回答
lost作形容词时意为迷路的;迷失的;失去的;丢失的;丧失的;无法恢复的;得不到的;无法再找到的;无法再造的，作动词时意为遗失;丢失;(因事故、年老、死亡等)损失，丧失，失去;被…夺去。
lost river是最近很火的一首歌曲，该歌曲从头到尾都只有旋律，听起来也稍微有点诡异，但是也别有一番感觉。那么下面来说说其中的lost这个单词是什么意思。
详细内容
lost
英 [lɒst] 美 [lɔːst]
adj. 迷路的;迷失的;失去的;丢失的;丧失的;无法恢复的;得不到的;无法再找到的;无法再造的
v. 遗失;丢失;(因事故、年老、死亡等)损失，丧失，失去;被…夺去
词语用例
all is not lost 还有一线希望
there is still some hope of making a bad situation better
be lost for words （惊讶、困惑等而）不知说什么才好
to be so surprised, confused, etc. that you do not know what to say
be lost in sth 全神贯注；沉浸于
to be giving all your attention to sth so that you do not notice what is happening around you
to be lost in thought 陷入沉思
be lost on sb 未被某人理解（或注意）
to be not understood or noticed by sb
His jokes were completely lost on most of the students.
他讲的笑话大多数学生一点都没能领会。
be lost to the world 全神贯注；沉浸于
to be giving all your attention to sth so that you do not notice what is happening around you
get lost (informal) （让人走开的不礼貌的说法）滚开，别来烦我
a rude way of telling sb to go away, or of refusing sth
give sb up for lost (formal) 认为某人没有生还的可能；认定某人已死
to stop expecting to find sb alive
make up for lost time （加快或加紧做某事以）弥补失去的时间
to do sth quickly or very often because you wish you had started doing it sooner
双语例句
Barely had I set foot in the street when I realised I was lost
我在街上没走几步就意识到自己迷路了。
My paper got lost
我的论文丢了。
Of the funeral he remembered only the cold, the waiting, and feeling very lost
关于葬礼，他只记得那冷冷的天，那久久的等候和那种茫然若失的感觉。
They are a lost generation in search of an identity.
他们属于迷惘的一代，想要找寻自我。
The sense of community is lost
社区意识不复存在。
He seemed to pine for his lost youth
他似乎很怀念逝去的青春。
Fox is not bitter about the lost opportunity to compete in the Games
福克斯并没有对错过了参赛机会感到不忿。
The meaning of that was lost on me
那意思我没听懂。
She was silent for a while, lost in thought, staring at the books littering the room.
一时间她默不作声，直想得入了神，双眼直愣愣地盯着房间里扔得到处都是的书。
I'd be lost without you here
没有你在这里我都不知怎么办好。
