Palibodha: 'obstacles', is the term for the following things if they obstruct the Bhikkhu in the strict practice of a subject of meditation: a crowded monastery, travelling, relatives, association with lay folk, gifts, pupils, repairs in the monastery, sickness, study, magical power. The latter, however, may become an obstacle only in developing insight vipassanā. See Vis.M III, 29ff.
Maha Thera Nyanatiloka. Manual of Buddhist Terms and Doctrines, Buddhist Publication Society, first edition 1952.