Byword/ˈbaɪwɜːrd/ Definition 1 of 2Pro Tip 1/3Metaphorical Use Often used metaphorically to imply a reputation someone or something has gained. His tardiness at work has become a byword in the office. Pro Tip 2/3Negative Implication Can imply negative characteristics or failures, not just positive qualities. The company's product is now a byword for unreliability. Pro Tip 3/3Cultural Reference May refer to sayings, phrases, or reputations specific to a culture or society. In our town, 'honest work' is the byword for a good life.