1. (noun)rattle, rattling, rale a rapidseries of short loud sounds (as might be heard with a stethoscope in some types of respiratory disorders)
"the death rattle"
2. (adj)fantastic, grand, howling(a), marvelous, marvellous, rattling(a), terrific, tremendous, wonderful, wondrous extraordinarily good or great ; used especially as intensifiers
"a fantastic trip to the Orient"; "the film was fantastic!"; "a howling success"; "a marvelous collection of rare books"; "had a rattling conversation about politics"; "a tremendous achievement"
3. (adj)alert, brisk, lively, merry, rattling, snappy, spanking, zippy quick and energetic
"a brisk walk in the park"; "a lively gait"; "a merry chase"; "traveling at a rattling rate"; "a snappy pace"; "a spanking breeze"
4. (adverb)very, really, real, rattling used as intensifiers; `real' is sometimes used informally for `really'; `rattling' is informal
"she was very gifted"; "he played very well"; "a really enjoyable evening"; "I'm real sorry about it"; "a rattling good yarn"