any of various machines for taking and recording soundings.
noun 1. a rocket equipped with instruments for making meteorological observations in the upper atmosphere.
noun 1. phonetic law.
adjective 1. without sound; silent; quiet. adjective 1. unfathomable; very deep. adjective 1. extremely still or silent adjective 1. (mainly poetic) extremely deep
adjective, sounder, soundest. 1. free from injury, damage, defect, disease, etc.; in good condition; healthy; robust: a sound heart; a sound mind. 2. financially strong, secure, or reliable: a sound business; sound investments. 3. competent, sensible, or valid: sound judgment. 4. having no defect as to truth, justice, wisdom, or reason: sound advice. 5. of […]