lean ~ lean
[For the right pronunciation of ‘lean’, please click here.]

leaning against/on a wall
“Lean”, a verb — lean – leant/leaned – leant/leaned – leaning, means ‘to rest oneself in a particular position of the body; to take support of something or someone; something not in a straight way; to bend’,
e.g.
She leaned forward to hear when he spoke in a soft voice.
The old man leaned against the wall and rested for a while.
____________________

a lean girl
“Lean” (adjective) means ‘(of a person or an animal) without much muscle or fat (very thin) and looks taller; something without much value’; and as a noun, it means ‘the degree or amount of leaning; the part of a cooked or raw meat without fat’,
e.g.
That girl looks lean; she needs to eat good food.
Most heart patients are advised to eat lean meat.
Monsoon days are lean days for most businesses.
