A reference book for looking up words and their meanings — a dictionary or lexicon.
古い日本語の意味を辞典で調べた。
I looked up the meaning of an old Japanese word in a lexicon.
辞典には発音や用例も載っている。
Dictionaries also include pronunciation and example usages.
図書館で専門辞典を借りた。
I borrowed a specialized dictionary from the library.