Definition of pro- in English:

pro-

Syllabification: pro-

prefix

Before in time, place, order, etc. proactive prognosis program

Origin

from Greek pro 'before'.

Definition of pro- in:

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Word of the day hypnopompic
Pronunciation: ˌhɪpnə(ʊ)ˈpɒmpɪk
adjective
relating to the state immediately preceding waking up