To make some change in; to make different in some particular; to vary in some degree, without an entire change. My covenant will I not break, nor alter the thing that has gone out of my lips. Psalm 89:34.

To change entirely or materially; as, to alter an opinion. In general, to alter is to change partially; to change is more generally to substitute one thing for another, or to make a material difference in a thing.

To become, in some respects, different; to vary; as, the weather alters almost daily. The law which altereth not. Daniel 6:8, 72.