A vertical arrangement of similar objects placed one above another.
There is a stack of books on the desk.
She carried a stack of clean plates.
Means to place objects in an ordered pile or vertical arrangement.
Stack the boxes against the wall.
She stacked the plates neatly.
Substantive noun frequently used in both conversational and formal contexts.
The committee focused on the critical role of stack in modern education.
Further study of stack will help uncover important underlying patterns.