Bîlinî
Byliny
Epics (Poetry)
Heroic poetry
Stariny

New Princeton encyclopedia of poetry and poetics, 1993 (An epic is a long narrativepoem that treats a single heroic figure or a group of such figures and concerns an historical event, such as a war or conquest, or an heroic quest or some other significant mythic or legendary achievement that is central to the traditions and belief of its culture ... Epic often focuses on a hero, sometimes semi-divine, who performs difficult and virtuous deeds; it frequently involves the interaction between human beings and gods.)
Drury, J. The poetry dictionary, c2006 (Epic: A long narrative poem that tells a story central to the myths and beliefs of a people.)
Ruse, C. The Cassell dictionary of literary and language terms, 1992 (Epic: A long narrative poem about heroic deeds and adventures. The earlier ones concern the history and legends of a country or region and include stories and information from many anonymous sources. These were oral or folk epics of which some were later written down.)
Cuddon, J. A dictionary of literary terms and literary theory, 1991 (Bylina: A type of Russian epic folksong or poetry often associated with an historical event or movement. The term bylina is of academic provenance and came into use in the 1830s; the peasants use the word starina ('what is old').)
The literary encyclopedia online, Dec. 20, 2012 (Byliny (singular bylina) is the conventional name given to Russian oral heroic poems. The poems, known to those who recited them as stariny, meaning "old songs", were firstly collected in Northern Russia, in the province of Olonets, in the 1860s and their collection continued on until the 1930s, in the regions near Lake Ladoga)

Lengthy poems narrating heroic deeds and events.