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3 definitions found
From: DICT.TW English-Chinese Dictionary 英漢字典
 head·room /ˈhɛdˌrum, ˌrʊm/
 淨空,頭上空間
From: Webster's Revised Unabridged Dictionary (1913)
 Head·room n. Arch. See Headway, 2. [Mostly Brit.]
 ◄ ►
From: WordNet (r) 2.0
 headroom
      n 1: vertical space available to allow easy passage under
           something [syn: headway, clearance]
      2: the capacity of a system to reproduce loud sounds without
         distortion [syn: dynamic headroom]