eclipse

I UK [ɪˈklɪps] / US verb [transitive]
Word forms "eclipse":
present tense I/you/we/they eclipse he/she/it eclipses present participle eclipsing past tense eclipsed past participle eclipsed

1) to make someone or something seem less successful or important, by becoming more successful or important than they are

His performance was eclipsed by Francisco's winning goal.

This tragic accident has eclipsed the two disasters on the railways last year.

2) astronomy to make the sun or moon become partly or completely dark because of the position of the sun, moon, and earth in relation to each other

II UK [ɪˈklɪps] / US noun
Word forms "eclipse":
singular eclipse plural eclipses

1) [countable] astronomy a short period when all or part of the sun or moon becomes dark, because of the positions of the sun, moon, and earth in relation to each other. A total eclipse is when the sun or moon is completely covered. An eclipse of the sun is called a solar eclipse, and an eclipse of the moon is called a lunar eclipse.

2) [singular/uncountable] a time when someone or something starts to seem less successful or important, because another person or thing has become more successful or important than they are

The rise of one aristocratic family usually meant the eclipse of another.

be in eclipse:

Their political power was in eclipse at the time.