drop-off

[ drop-awf, -of ]

/ ˈdrɒpˌɔf, -ˌɒf /

a vertical or very steep descent: The trail has a drop-off of several hundred feet.

a decline; decrease: Sales have shown a considerable drop-off this year.

a place where a person or thing can be left, received, accommodated, etc.: a new drop-off for outpatients.

applied when a rented vehicle is left elsewhere than at the point of hire: to pay a drop-off charge.

Origin of drop-off

First recorded in 1955–60; noun, adj. use of verb phrase drop off

The effort has not just been focused on “drop-off” voters—that is, Democrats who voted in 2012 but not in the 2010 midterms.

The Democrats’ Simple Midterm Weapon |Ben Jacobs |November 4, 2014 |DAILY BEAST
Not far from the drop-off point, the team ran into their first roadblock.

The Original Ebola Hunter |Abby Haglage |September 14, 2014 |DAILY BEAST
The drop-off is even steeper over the past 30 years: in 1982 the number was 56.4 percent.

How We Read Now: 10 Facts from the National Endowment for the Arts Report |Thomas Flynn |September 26, 2013 |DAILY BEAST
The U.S. economic recovery, largely driven by a recovery in housing, could be threatened by this drop-off.

Rising interest rates spur drop in mortgage financing activity |Edward Ferguson |July 12, 2013 |DAILY BEAST

But I would expect to see some drop-off in applications, perhaps a substantial one.

The Future of the MD |Megan McArdle |January 23, 2013 |DAILY BEAST
A fine, large fire was started on the ledge of rock that extended out from the "Shelter" to a drop-off of some twenty feet.

The Meadow-Brook Girls in the Hills |Janet Aldridge