Meaning 1 · most common
increase gradually
To make something become larger or greater over time, often slowly.
Examples
If you save a little money each month, your savings will build up over time.
A: Why is there so much traffic today?
B: It tends to build up around 5 p.m. when everyone leaves work.
Common mistake
Not: Pressure builds up slowly over the time.
Say: Pressure builds up slowly over time.
'Over time' — no 'the'.
More on “increase gradually”Another example · Tell it apart · Goes with · Tip
Another example
During the exam period, stress can build up if you don't take breaks.
Tell it apart
It builds up gradually.
It shoots up suddenly.
Goes with
- build up + over time