in the unlikely event
If something improbable should occur. For example, In the unlikely event that I'm held up, please cover for me, or In the unlikely event that we should have snow in May, we're still well equipped to cope with it. Also see under in case, def. 2.
“In Case Of” vs. “In The Event Of”: Which One Is Correct?Do you break the glass in case of emergency or in the event of emergency? The phrases in case of and in the event of are both prepositions. The first one means if it should occur. The second means if or when something happens. A preposition is a word or phrase that shows a relationship between two elements in a clause. Some common prepositions are …
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.