(adj.adv.) : offĭcĭōsus, a, um, adj.officium.
* Full of courtcousness or complaisance, obliging, ready to serve (esp. towards one's superiors; class.; syn. studiosus): homo,Cic. Fam. 13, 21, 2: amicitia,id. Planc. 19, 46: sedulitas,Hor. Ep. 1, 7, 8: voluntas,Ov. P. 3, 2, 17.—Comp.: estne quisquam, qui tibi officiosior, liberaliorque videatur?Cic. Rosc. Com. 6, 18; id. Att. 13, 45, 3.—Sup.: officiosissima natio candidatorum,Cic. Pis. 23, 55; for which with summe: homines Lampsaceni summe in omnes cives Romanos officiosi,Cic. Verr. 2, 1, 24, § 63.
* Dutiful, in accordance with duty: dolor,Cic. Tusc. 3, 28, 70: labores,id. Mil. 5, 12: pietas,Sen. Ep. 99, 18.
* Subst.: offĭcĭō-sus, i, m., an official or attendant at a bath, Petr. 92.—Hence, adv.: offĭcĭōsē, courteously, obligingly (class.): officiose et amice factum,Cic. Lael. 20, 81: aliquid facere, Afran. ap. Charis. p. 247 P.: scribere,Cic. Att. 1, 20, 1.—Comp.: gratum etiam Pilia (fecit), sed illa officiosius, quod, etc.,Cic. Att. 6, 1, 22.—Sup.: officiosissime venit ad me,Plin. Ep. 10, 21 (32) init.

s. TLL