What does antilogarithm mean?

The definition of antilogarithm

An`ti*log”a*rithm, n. (Math.)

The number corresponding to a logarithm. The word has been sometimes, though rarely, used to denote the complement of a given logarithm; also the logarithmic cosine corresponding to a given logarithmic sine.

The number corresponding to a logarithm. The word has been sometimes, though rarely, used to denote the complement of a given logarithm; also the logarithmic cosine corresponding to a given logarithmic sine.

— An`ti*log`a*rith”mic, a.