Definition of rapidly in English:

rapidly

adverb

  • Very quickly; at a great rate.

    ‘the business is expanding rapidly’
    ‘the problem is rapidly worsening’
    • ‘Both Mr and Mrs Hayhurst were stranded on the roof as the river continued to rise rapidly.’
    • ‘Mark decided simply to set one up and since then, he has seen the business expand rapidly.’
    • ‘In the heat, the grass grows rapidly and the flowers wilt fast, so there was much to be done.’
    • ‘Yet even he admits that defending his sport is rapidly becoming an impossible task.’
    • ‘Pea aphids can be found at low levels but are expected to multiply rapidly in the warm weather.’
    quickly, fast, swiftly, speedily, at speed, at full speed, at the speed of light, post-haste, hotfoot, at full tilt, as fast as one's legs can carry one, at a gallop, expeditiously, briskly, promptly
    hurriedly, in a hurry, fast and furious, hastily, in haste, in a rush, precipitately, abruptly
    like a shot, double quick, before one can say jack robinson, in a flash, hell for leather, at warp speed, pronto, at the double, like a bat out of hell, like lightning, like greased lightning, like a madman, like a madwoman, like mad, like crazy, like blazes, like a streak, like the wind, like a bomb, like nobody's business, like a scalded cat, like the deuce, a mile a minute, before the ink is dry on the page, before one can say knife
    like the clappers, at a rate of knots, like billy-o
    lickety-split
    apace
    View synonyms

Pronunciation:

rapidly

/ˈrapɪdli/