week is on the Basic English 850 List. weather - week - weight week is one of the 1000 most common headwords. wee - week - weigh Pronunciation enPR: wēk, IPA (key): /wiːk/ SAMPA: /wi:k/ Audio (US)(file) Audio (UK)(file) Homophone: weak Noun Singular week Plural weeks (countable) A week is a period of time that lasts seven days. There are seven days in one week. Wikiwand - on Seamless Wikipedia browsing. On steroids.