Definition: 1. fortnight (2) 2 days or week, especially in summer: A fortnight's holiday. The fortnight is an abbreviated time frame. In our English language, we often use "twoweek" as a way to denote this. Here are some definitions of "fortnightly": - A term that signifies the end of a month (e.g., "It's almost the end of the month"). It typically indicates the beginning of the next month. - It refers to the period during which one is engaged in continuous, regular, or routine activities. It can also be used to describe an event or activity occurring frequently. For example, in terms of language, you might use "fortnightly" for a long time without any break between them. In context, "fortnightly" could also mean that something has been going on continuously for a prolonged period, as in a routine job.