A lexicon is a dictionary. In the field of biblical studies, lexicons typically provide definitions for words in Hebrew, Aramaic, or Greek.
Hardcopy lexicons often require some knowledge of the original languages.
Software lexicons require no such knowledge, and assist the reader with automated searches.
Arndt, Danker, & Bauer, A Greek-English lexicon of the New Testament and other early Christian literature, 2000.
Balz & Schneider, Exegetical Dictionary of the New Testament, 1990-1993.
Eynikel, Lust & Hauspie, A Greek-English Lexicon of the Septuagint, 2003.
Friberg, Friberg & Miller, Analytical Lexicon of the Greek New Testament, 2000.
Kittel, Bromiley & Friedrich, Theological Dictionary of the New Testament, 1964-1976.
Koehler, et el., Hebrew and Aramaic Lexicon of the Old Testament, 1995-2000.
Liddell, Scott & Jones, A Greek-English Lexicon, 1996.
Louw & Nida, Greek-English Lexicon of the New Testament: Based on Semantic Domains, 1989.
Newman, Concise Greek-English Dictionary of the New Testament, 1993.
Spicq, Theological Lexicon of the New Testament, 1994.
Swanson, Dictionary of Biblical Languages with Semantic Domains (Hebrew/Aramaic/Greek), 2001.
Zodhiates, The Complete Word Study Dictionary: New Testament, 2000.