A deformation retract for the enrichment of a category enriched over a closed monoidal homotopical category is a deformation retract of a homotopical category for the two-variable adjunction
(power, copower, internal hom) :
satisfying a bunch of extra conditions.
This is definition 16.1, p. 46 in Shulman: Homotopy limits and colimits and enriched homotopy theory