1. occurring three times a week
2. occurring every three weeks
Usage: ambiguous usage

1. three times a week
2. every three weeks
Usage: ambiguous usage

1. a publication issued three times a week or every three weeks

Examples

• The fitness class meets triweekly on Monday, Wednesday, and Friday.
• Our triweekly newsletter is published every three weeks.
• She visits her grandmother triweekly.
• The committee holds triweekly meetings throughout the semester.
• The local triweekly covers community news and events.
• Due to the ambiguous nature of the term, we clarified that triweekly meant three times per week.