An unofficial front-end to Multitran, the Russian-English dictionary translators keep open in a browser tab: many senses per word, marked by field, from law to engineering. Free.
Multitran is not a beginner's dictionary. Its value is the opposite of a clean answer: for one term it shows dozens of translations contributed over the years, each tagged with the field it belongs to — legal, medical, oil and gas, IT — so a translator can pick the one that fits the document instead of the one that sounds right.
The bot brings that into the chat. Send a word in Russian or English and the senses come back with their field labels, which is exactly what you want when the word is a term rather than a word.
It is unofficial, so treat availability as a courtesy rather than a guarantee, and check anything critical against the site itself.
Free
| Criterion | Weight | Points | |
|---|---|---|---|
| Functionality | 25 | 8 / 10 | |
| Reliability & speed | 15 | 6 / 10 | |
| Popularity & trust | 15 | 6 / 10 | |
| Price & free tier | 10 | 10 / 10 | |
| Usability | 10 | 7 / 10 | |
| Safety & privacy | 10 | 8 / 10 | |
| Freshness | 5 | 5 / 10 | |
| Localization | 5 | 10 / 10 | |
| No intrusive ads | 5 | 10 / 10 | |
| Score | 100 | 75.0 |
No, the bot itself says it is unofficial; the dictionary behind it is the well-known site.
Translators and anyone working with terminology; for everyday words a general translator is simpler.