Definition

verb

To cause (something) to cease to be in one's possession or capability due to unfortunate or unknown circumstances, events or reasons.
“He lost his hearing in the explosion.”
To wander from; to miss, so as not to be able to find; to go astray from.
“I lost my way in the forest.”
To fail to win (a game, competition, trial, etc).
“We lost the football match.”

adjective

Having wandered from, or unable to find, the way.
“The children were soon lost in the forest.”
In an unknown location; unable to be found.
“Deep beneath the ocean, the Titanic was lost to the world.”
Not perceptible to the senses; no longer visible.
“an island lost in a fog; a person lost in a crowd”