Tuesday/ˈtuːzdeɪ,ˈtuːzdi/ Definition 1 of 1Pro Tip 1/3Day Abbreviation Tuesday can be abbreviated as 'Tue.' when writing dates in short form. Meeting rescheduled to Tue. 5th April. Pro Tip 2/3Cultural Significance In some cultures, Tuesday is considered an unlucky day to start important activities. My grandmother insists we shouldn't get married on a Tuesday. Pro Tip 3/3Weekly Occurrence Use 'every Tuesday' to express a recurring event happening on Tuesdays. Yoga classes take place every Tuesday evening.