‘履约’ is a formal verb meaning 'to honor a contract' or 'to fulfill contractual obligations.' The character 履 (lǚ) literally means 'to tread' or 'to carry out,' and 约 (yuē) means 'agreement' or 'contract.' Together, they convey the idea of stepping forward to meet what has been agreed upon — like walking the path laid out by the contract. It emphasizes reliability, legal responsibility, and trustworthiness in professional or official contexts.

This term is commonly used in business, law, finance, and government settings — for example, when discussing whether a company has delivered goods on time, paid invoices as promised, or complied with regulatory terms. It rarely appears in casual speech; instead, everyday equivalents like ‘守约’ (shǒu yuē, 'to keep one’s promise') or ‘做到’ (zuò dào, 'to deliver on') are more common. '履约' carries a tone of formality and institutional accountability.