There are famous Turkish dictionaries on my country. I'll share these sites and search engine URLs that I used any context menu extension. Please add these sites to your extension on next updates.

• KubbeAlti Dictionary: http://lugatim.com/s/{searchTerms}
• Voice Dictionary (Sesli Dictionary): https://www.seslisozluk.net/{searchTerms}-nedir-ne-demek/
• Tureng Dictionary: https://tureng.com/tr/turkce-ingilizce{searchTerms}
• Turkish Language Association (Türk Dil Kurumu): https://sozluk.gov.tr/?kelime={searchTerms}
• Zargan Dictionary: https://www.zargan.com/tr/q/{searchTerms}-ceviri-nedir

I found new dictionaries sites. I'll share these below.

• Dil Derneği (means “Language Association”): This dictionary's homepage is http://www.dildernegi.org.tr/TR,274/turkce-sozluk-ara-bul.html. But I don't find search engine URL
• Kelimeler.gen.tr (means “Words.gen.tr”): https://kelimeler.gen.tr/sozlukte-ara?q={searchTerms}
• Nedir Ara (means “What is it? Search”): https://nedirara.com/{searchTerms}
• TürkçeSözlük.net (means “TurkishDictionary.net”): https://www.turkcesozluk.net/index.php?word={searchTerms}&sozluk=turkce

esdemirei said:

There are famous Turkish dictionaries on my country. I'll share these sites and search engine URLs that I used any context menu extension. Please add these sites to your extension on next updates.

• KubbeAlti Dictionary: http://lugatim.com/s/{searchTerms}
• Voice Dictionary (Sesli Dictionary): https://www.seslisozluk.net/{searchTerms}-nedir-ne-demek/
• Tureng Dictionary: https://tureng.com/tr/turkce-ingilizce{searchTerms}
• Turkish Language Association (Türk Dil Kurumu): https://sozluk.gov.tr/?kelime={searchTerms}
• Zargan Dictionary: https://www.zargan.com/tr/q/{searchTerms}-ceviri-nedir

I found new dictionaries sites. I'll share these below.

• Nisanyan Dictionary (Nişanyan Sözlük): https://www.nisanyansozluk.com/?k={searchTerms}
• What's Dictionary (Nedir Sözlük): https://nedir-sozluk.com/ara/{searchTerms}
  NOT: This is alternative search URL. This URL is https://nedir-sozluk.com/anlami/{searchTerms{ | }{ |-}}-ne-demek. If you search compound word thas has 2 and more word this URL gives error. For example “muhabbet kuşu” means that budgerigar in Turkish. You need to use dash (-) instead of space between words. https://nedir-sozluk.com/anlami/muhabbet kuşu-ne-demek gives error but https://nedir-sozluk.com/anlami/muhabbet-kuşu-ne-demek works successfully.
• What's, What Means Dictionary (Nedir Ne Demek Sözlük): https://www.nedirnedemek.com/{searchTerms{ | }{ |-}}-ne-demek
  NOT: You need to use dash (-) instead of space between words like What's Dictionary. https://www.nedirnedemek.com/muhabbet kuşu-ne-demek gives error but https://www.nedirnedemek.com/muhabbet-kuşu-ne-demek works successfully.

There are famous Turkish dictionaries on my country. I'll share these sites and search engine URLs that I used any context menu extension. Please add these sites to your extension on next updates.

• KubbeAlti Dictionary: http://lugatim.com/s/{searchTerms}
• Voice Dictionary (Sesli Dictionary): https://www.seslisozluk.net/{searchTerms}-nedir-ne-demek/
• Tureng Dictionary: https://tureng.com/tr/turkce-ingilizce{searchTerms}
• Turkish Language Association (Türk Dil Kurumu): https://sozluk.gov.tr/?kelime={searchTerms}
• Zargan Dictionary: https://www.zargan.com/tr/q/{searchTerms}-ceviri-nedir