Lewis Short
ob-lectātĭo (noun F) : id.
* A delighting, delight (a favorite word of Cic.): indagatio ipsa habet oblectationem,Cic. Ac. 2, 41, 127: animi,id. de Or. 1, 26, 118: curarum,id. Off. 2, 6: vitae,id. Fin. 5, 19, 53: requies plena oblectationis fuit,id. Lael. 27, 103.
Charlton T. Lewis, Charles Short, A Latin Dictionary