| n. | 1. | The state or quality of being heavy in its various senses; weight; sadness; sluggishness; oppression; thickness. |
| Noun | 1. | heaviness - the property of being comparatively great in weight; "the heaviness of lead" Synonyms: weightiness Antonyms: lightness, weightlessness - the property of being comparatively small in weight; "the lightness of balsa wood" |
| 2. | heaviness - used of a line or mark Synonyms: thickness |