Correct spelling for the English word "GLUCYS" is [ɡlˈʌsɪz], [ɡlˈʌsɪz], [ɡ_l_ˈʌ_s_ɪ_z] (IPA phonetic alphabet).
There is no recognized English term "GLUCYS" in the standard dictionary. It seems to be an uncommon or non-existent word, and as a result, no definition is available.
However, it is worth mentioning that Glucys is the name of a popular restaurant chain in France. It specializes in serving kebabs and other fast-food items. In this context, the term "Glucys" could refer to the name of this specific restaurant or be used to describe items related to it, such as their menu, products, or even the dining experience. Nevertheless, it is important to note that this usage would be restricted to a particular brand and would not constitute a broader linguistic definition.
If the term "GLUCYS" is being used in a different context, it is recommended to seek further clarification or provide more information to obtain an accurate definition.