Question

Jack. I have lost both my parents. Lady Bracknell. To lose one parent, Mr. Worthing, may be regarded as a misfortune; to lose both looks like carelessness. –The Importance of Being Earnest, Oscar Wilde The pun in this passage relies on which two definitions of the word lose?
“to waste”
“to be defeated in a contest or game”
“to misplace”
“to suffer the death of someone dear”
“to fail to maintain control”

Answer 1

In this passage, the two definitions of the word lose refer to;

"To suffer the death of someone dear"

Jack claims that he has lost his parents. Meaning, they passed away. He goes on to speak of his loss. Losing his parents, they've passed away.

Answer 2

Answer by YourHope:

“to suffer the death of someone dear"

:)