maineffect
nounUK /ˈmeɪn ɪˌfekt/
US /ˈmeɪn əˌfekt/
The main effect is the biggest change you see from something.
The main effect of the rain was that the park got very muddy.
RELATED WORDS
OTHER MEANINGS
2. In science, the main effect is the result of changing just one thing in a test.
The main effect of adding more water was that the plant grew taller.
3. The most important way something changes a situation.
The main effect of the new rule was that everyone had to wait a little longer.
4. The strongest single result when you compare different groups.
The main effect showed that the red team scored more points than the blue team.