Definitions of underarm
  1. adjective
    with hand brought forward and up from below shoulder level
    synonyms: underhand, underhanded
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    overarm, overhand, overhanded
    with hand brought forward and down from above shoulder level
    with the arm swung round at shoulder height
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  2. adverb
    with the hand swung below shoulder level
    “throwing a ball underarm
    synonyms: underhand
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