Definition of "sough" [sough]

• To make a soft murmuring or rustling sound. (verb-intransitive)
• A soft murmuring or rustling sound, as of the wind or a gentle surf. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The word sough, now pronounced suff, was formerly called sow; whence the iron fused and received into a sough acquired the name of sowmetal; and that received into less soughs from the former one obtained the name of pigs of iron or of lead; from the pun on the word sough, into sow and pigs."
• "The word sough, now pronounced suff, was formerly called sow; whence the iron fused and received into a sough acquired the name of sowmetal; and that received into less soughs from the former one obtained the name of pigs of iron or of lead; from the pull on the word sough, into sow and pigs."
• "Over and over the same round his thoughts went, till, worn out with anxiety and watching, and lulled unconsciously by the soft "sough" of the wind in the pines, he fell asleep."