eclipse

noun

• 1an obscuring of the light from one celestial body by the passage of another between it and the observer or between it and its source of illumination:an eclipse of the sun
• a loss of significance or power in relation to another person or thing:the election result marked the eclipse of the traditional right

• 2 Ornithology a phase during which the distinctive markings of a bird (especially a male duck) are obscured by moulting of the breeding plumage: [as modifier]:eclipse plumage

verb

• (of a celestial body) obscure the light from or to (another celestial body):Jupiter was eclipsed by the Moon
• deprive (someone or something) of significance or power:the economy has eclipsed the environment as the main issue
• literary obscure or block out (light):a sea of blue sky violently eclipsed by showers