noun
a form of energy that is hypothesized to permeate all of space and accelerate the expansion of the universe
adjective
describing the type of energy as being dark or mysterious in nature
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Dark energy is a hypothetical form of energy that is proposed to permeate all of space, causing the universe to expand at an accelerating rate.
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Scientists are still trying to understand this mysterious dark energy that seems to be pushing the universe apart.
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I heard that dark energy is like the force in Star Wars, but in real life.
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The dark energy in the room was palpable, creating a tense and uneasy atmosphere.