This is the 7532nd most frequent Russian word.
дипломатическая
"Diplomatic."
Here, 'дипломатическая' is used as an adjective to describe the type of meeting, indicating it relates to diplomacy or international relations.
Дипломатическая встреча проходила в закрытом режиме.
The diplomatic meeting was held behind closed doors.
In this context, 'дипломатическую' refers to a quality of caution or strategy, synonymous with being tactful.
Она всегда проявляет дипломатическую осторожность в своих высказываниях.
She always exhibits diplomatic caution in her statements.
The word 'дипломатическая' modifies the noun 'миссия', referring to the official representation and tasks related to diplomacy or international engagement.