5 definitions
Definition.com
Lean Theorem Prover (n.) is a compiler for arguments.
Definition.com
Lean Theorem Prover (n.) is the receipt that shows a proof actually paid.
Definition.com
Lean Theorem Prover (n.) is a proofreader that accepts nothing on charm.
Definition.com
Lean Theorem Prover (n.) is how a mathematician turns 'trust me' into 'run it'.
Definition.com
Lean Theorem Prover (n.) is a language in which a proof has to explain itself to a stubborn machine.