theo‧ret‧i‧cal W3 AC / θɪəretɪk ə l $ θiə- / ( also theo‧ret‧ic / θɪəretɪk $ θiə- / ) 形容词

1 relating to the study of ideas, especially scientific ideas, rather than with practical uses of the ideas or practical experience → theory , practical , applied :

theoretical physics

Aristotle’s theoretical model of the universe

She has theoretical knowledge of teaching, but no practical experience.

2 a theoretical situation or condition could exist but does not really exist 同义词 hypothetical :

Equality between men and women in our society is still only theoretical.

a theoretical risk of an explosion