- solidThat can be picked up or held, having a texture, and usually firm. Unlike a liquid, gas or plasma.
- solIn a movable-do or tonic sol-fa system: the fifth step in a scale, preceded by fa and followed by la.
- solidarityA bond of unity or agreement between individuals, united around a common goal or against a common enemy, such as the unifying principle that defines the labor movement; mutual support within a group.
- soldoAn Italian coin, formerly one-twentieth of a lira.
- solidumThe die of a pedestal.