Mahaggata: lit., 'grown great', i.e. 'developed', exalted, supernormal. As mahaggata-citta it is the state of 'developed consciousness', attained in the fine-material and immaterial absorptions see: Jhanas it is mentioned in the mind-contemplation of the Satipatthāna Sutta M. 10. - As mahaggatārammana it is the 'developed mental object' of those absorptions and is mentioned in the 'object triad' of the Abhidhamma schedule and Dhs.
Maha Thera Nyanatiloka. Manual of Buddhist Terms and Doctrines, Buddhist Publication Society, first edition 1952.