the GNU version of the Collaborative International Dictionary of English
n. Same as loadstone.
The Century Dictionary and Cyclopedia
n. A variety of magnetite, or the magnetic oxid of iron, which possesses polarity and has the power of attracting fragments of iron. See magnet.
n. A leading-stone for drains.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a permanent magnet consisting of magnetite that possess polarity and has the power to attract as well as to be attracted magnetically
Word Usage
"The name lodestone comes from the old English meaning "way stone" because a sliver of iron rubbed with lodestone also becomes magnetised, and this is how the first compass needles were made."