(astronomy) A supernova whose spectrum lacks, or is highly deficient in, hydrogen lines, and where the star has already blown away its outer hydrogen envelope, having exposed the lower enveloping helium layer, prior to the explosion.

(Nigeria) The prevalence of "brown envelope journalism", i.e. bribing journalists for positive press coverage.

The practice of giving bribes to journalists in exchange for positive press coverage.

Synonym of push the envelope

simple past tense and past participle of push the edge of the envelope

Third-person singular simple present indicative form of push the edge of the envelope

present participle of push the edge of the envelope

(archaic) second-person singular simple present form of envelop