heaviness

from WordNet (r) 3.0 (2006)

heaviness
    n 1: the property of being comparatively great in weight; "the
         heaviness of lead" [syn: {heaviness}, {weightiness}] [ant:
         {lightness}, {weightlessness}]
    2: persisting sadness; "nothing lifted the heaviness of her
       heart after her loss"
    3: an oppressive quality that is laborious and solemn and lacks
       grace or fluency; "a book so serious that it sometimes
       subsided into ponderousness"; "his lectures tend to heaviness
       and repetition" [syn: {ponderousness}, {heaviness}]
    4: used of a line or mark [syn: {thickness}, {heaviness}]
    5: unwelcome burdensome difficulty [syn: {burdensomeness},
       {heaviness}, {onerousness}, {oppressiveness}]

from The Collaborative International Dictionary of English v.0.48

Heaviness \Heav"i*ness\, n.
   The state or quality of being heavy in its various senses;
   weight; sadness; sluggishness; oppression; thickness.
   [1913 Webster]