hash table: n.
an object of type hash-table,
which provides a mapping from keys to values.
home package: n. (of a symbol)
the package, if any, which is contents of the package cell
of the symbol, and which dictates how the Lisp printer
prints the symbol when it is not accessible in the
current package. (Symbols which have nil in their
package cell are said to have no home package, and also
to be apparently uninterned.)