samavāya : [m.] combination; coming together.

A.P. Buddhadatta Mahathera, Concise Pali-English and English-Pali Dictionary [available as digital version from Metta Net, Sri Lanka]

Samavāya (m.) coming together, combination S iv.68; Miln 376; DhsA 57, 196; PvA 104; VvA 20, 55. samavāyena in common VvA 336; khaṇa -- s˚ a momentary meeting J i.381.

Pali-English Dictionary, TW Rhys Davids, William Stede,

    sam-avâya m. coming or meeting together, contact, concourse, congress, assemblage, collection, crowd, aggregate (ena or āt, 'in combination'
• ○yaṃ-√kṛ, 'to meet, combine, flock together') GṛS. Gaut. Mn. &c
• conjunction (of heavenly bodies) MBh. VarBṛS
• collision ŚrS. Gaut. Sarvad
• (in phil.) perpetual co-inherence, inner or intimate relation, constant and intimate union, inseparable concomitance (= nitya-sambandha, the sixth Padârtha or category of the Vaiśeshikas, expressing relation which exists between a substance and its qualities, between a whole and its parts e.g. between cloth and the yarn composing it, between a genus and its individuals &c.) Kap. Jaim. IW. 66 ; 69 [Page 1158, Column 1]
• course, duration (e, with gen., 'during') MBh. i, 556
• -khaṇḍana n. N. of wk
• -tas ind. in consequence of constant and intimate connection or relation MW
• -tva n. the state of (being) intimate relation, Kusum
• -pramāṇa-vādârtha m. vāda m. N. of wks
• -sambandha m. intimate and constant connection, inseparable relation (as described above), connection by inseparable inherence W 

Sanskrit-English Dictionary, by M. Monier William