Sound1, a.
[compar. SOUNDER; superl. SOUNDEST.] [A-S. sund, gesund, L. Ger., Dan., & Sw. sund, D. gezond, O. H. Ger. gisunt, N. H. Ger. gesund, allied to Lat. sanus.]
Sense 1. Entire; unbroken; free from imperfection, defect, or decay; perfect of the kind; as, sound timber; sound fruit; a sound apple or melon; a sound tooth; a sound ship; a sound body.
Sense 2. Healthy; not diseased; not being in a morbid state; — said of body or mind; as, a sound body; sound health; a sound constitution; a sound man; a sound understanding.
Sense 3. Firm; strong; vigorous.
The brass work here, how rich it is in beams, And how, besides, it makes the whole house sound! Chapman.
Sense 4. Founded in truth; supported by justice or law; weighty; solid; not to be overthrown or refuted; as, sound argument or reasoning; a sound objection; sound doctrine; sound principles.
Sense 5. Heavy; laid on with force; as, sound strokes; a sound beating.
Sense 6. Fast; profound; unbroken; undisturbed; as, sound sleep.
Sense 7. Free from error; correct; orthodox.
Hold fast the form of sound words which thou hast heard of me. 2 Tim. i. 13.
Sense 8. Founded in right and law; legal; valid; not defective; that can not be overthrown; as, a sound title to land; sound justice.
☞ Sound is sometimes used in the formation of self-explaining compounds; as, sound-headed, sound-hearted, sound-timbered, and the like.
Sound currency (Com.), a currency whose actual value is the same as its nominal value; and, if in bank notes or other substitute for silver and gold, a currency which is so sustained by funds that it is at any time convertible into gold and silver, and of course of equal value.