(SPECIAL) [adjective] [before noun; not gradable] - special or single; this and not any otherDo you have any particular preference where we sit?When you said we should eat out, did you have a particular restaurant in mind?"Why did you ask?" "Oh, no particular reason, just making conversation."
PARTICULAR
Meaning of PARTICULAR in English
Cambridge English vocab. Кембриджский английский словарь. 2012