1. past tense and past participle of lean; to incline or bend from a vertical position
Usage: British English spelling; American English typically uses 'leaned'
2. past tense and past participle of lean; to rest against something for support
Usage: British English spelling; American English typically uses 'leaned'
3. past tense and past participle of lean; to rely on or depend on someone or something
Usage: British English spelling; American English typically uses 'leaned'; figurative use

Examples

• She leant against the wall to catch her breath.
• He leant the ladder against the fence.
• The tower leant slightly to one side.
• During difficult times, she leant on her family for support.
• The old man leant on his cane as he walked.
• They leant out the window to see the parade.
• He leant towards the microphone to speak clearly.