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Wiktionary (0.00 / 0 votes) Rate this definition: pneumatology (Noun) The study of spiritual beings and phenomena, especially the interactions between humans and God. pneumatology (Noun) The study of the Holy Spirit as revealed in Scripture. Origin: ÏÎ½Îµá¿¦Î¼Î± (pneuma), breath, and -logy.
uncountable noun. 1  Gerontology is the study of the process by which we get old, how our bodies change, and the problems that old people have. 2  the scientific study of ageing and the problems associated with older people. 3  the scientific study of the process of aging and of the problems of aged people.