A temporary decrease in blood supply to part of your brain causes TIAs, which often last less than five minutes. Like an ischemic stroke, a TIA occurs when a clot or debris blocks blood flow to part of your brain. A TIA doesn't leave lasting symptoms because the blockage is temporary.
Full Definition of FORTNIGHT. : a period of 14 days: two weeks.ull Definition of FORTNIGHT. : a period of 14 days: two weeks.
Report Abuse. fortnight is a unit of time equal to two weeks: that is 14 days, or literally 14 nights. The term is common in the British Isles and many Commonwealth countries, but rarely used in the United States.