Here are some ways to understand the meaning:
* Predetermined fate: "My lot in life is to be a farmer, just like my ancestors."
* Circumstances and challenges: "Life has dealt me a tough lot in life, but I'm determined to make the best of it."
* General life experiences: "I'm happy with my lot in life, even though I'm not rich or famous."
The idiom often implies a sense of acceptance of one's situation, whether good or bad. It can also be used to express resignation or frustration with the challenges one faces.
Here are some examples of how the idiom is used in a sentence:
* "I've accepted my lot in life and am content with what I have."
* "She feels like she's been dealt a bad lot in life, but she's determined to overcome her struggles."
* "He's always complaining about his lot in life, but he never tries to change it."