| n. | 1. | The state or quality of being firm. |
| Noun | 1. | firmness - the firmness and tone of healthy tissue; "his muscle firmness" Synonyms: soundness |
| 2. | firmness - the trait of being resolute; firmness of purpose; "his resoluteness carried him through the battle"; "it was his unshakeable resolution to finish the work" | |
| 3. | firmness - the property of being unyielding to the touch | |
| 4. | firmness - the quality of being steady or securely and immovably fixed in place Synonyms: steadiness |