the GNU version of the Collaborative International Dictionary of English
v. To let below the value.
v. To let or lease at second hand; to sublet.
The Century Dictionary and Cyclopedia
n. In brewing, a pipe which serves to admit water below the false bottom of the mash-tun or mashing-vat, replacing with fresh water the wort when drawn off.
To let below the true or the market value. To sublet.
Word Usage
"Now that I was left wholly to myself, I gave notice of my intention to quit the chambers in the Temple as soon as my tenancy could legally determine, and in the meanwhile to underlet them."