Which/wɪtʃ/ Definition 1 of 4Pro Tip 1/3Choice Clarification Use 'which' to clarify a choice from a limited set of options. There are several colors available, which do you prefer? Pro Tip 2/3Question Precision When asking questions, 'which' helps to show you're expecting specific information as an answer. Which of these dishes is the spiciest? Pro Tip 3/3Not 'What' 'Which' implies a choice among a specific group, unlike the more general 'what'. There are many books here; which did you read?