During a total solar eclipse, the moon completely blocks the sun's light, turning day into twilight for several minutes.
在日全食期间，月球完全遮挡太阳光，使白昼在几分钟内变成黄昏。
Which choice best defines “eclipse”?
C — Blocking of light. “eclipse” means blocking of light.
Which word means “blocking of light”?
B — eclipse. “eclipse” means blocking of light.
eclipse — blocking of light. In Chinese: 日食，黯然失色.
eclipse is pronounced /ɪˈklɪps/.
During a total solar eclipse, the moon completely blocks the sun's light, turning day into twilight for several minutes. (在日全食期间，月球完全遮挡太阳光，使白昼在几分钟内变成黄昏。)
obscure, overshadow, dim — all close in meaning to eclipse (blocking of light).
illuminate, reveal — each the opposite of eclipse (blocking of light).
Yes. eclipse is on the SAT Prep Easy list — mid-frequency academic words that do get tested. The Digital SAT does not test vocabulary in isolation; words like this one are tested through Words in Context questions, where you choose the word that completes a passage most logically and precisely.
e(out)+clipse(to cover)