stack up
Third Person
stacks up
Present Participle
stacking up
Past Tense
stacked up
Past Participle
stacked up
1
to neatly arrange objects, usually in a vertical arrangement, forming piles
transitive
- The librarian worked diligently to stack up the returned books in their designated places on the shelves.
- After finishing the puzzle, she decided to stack the pieces up neatly on the table.
- The warehouse manager instructed the team to stack up the boxes according to their size for efficient storage.
- The students were asked to stack their textbooks up at the back of the classroom before the exam.
- The construction workers were careful to stack up the bricks securely to build a stable wall.
2
(of aircraft) to fly over an airport at different heights, waiting for specific landing instructions
- Due to heavy air traffic, planes had to stack up over the airport, causing delays in landing.
- During the storm, planes were forced to stack up in the air, creating a challenging situation for air traffic control.
- With limited available runways, air traffic controllers had to efficiently stack up the planes during peak hours to ensure safety and order.
- Air traffic controllers had to make quick decisions to safely stack up the planes during the peak travel hours.
- The unexpected closure of a runway forced the airport to stack up incoming flights until the issue was resolved.