olemus
Wiktionary:
1 a reference work with a list of words from one or more languages, normally ordered alphabetically, explaining each word's meanings (senses), and sometimes also containing information on its etymology, pronunciation, usage, semantic relations, and translations, as well as other data
4 (computing) an associative array, a data structure where each value is referenced by a particular key, analogous to words and definitions in a dictionary (sense 1)

dictionary system -- sõnastiksüsteem

ülevaateid
https://en.wikipedia.org/wiki/Dictionary

https://en.wikipedia.org/wiki/Dictionary_(disambiguation)

http://www.ciil-ebooks.net/html/lexico/link5.htm

https://www.britannica.com/topic/dictionary