To engage or hire (someone), especially temporarily.

• It is ſuch a Rarity as this that I ſavv at Vendome in France, vvhich they there pretend is a Tear that our Saviour ſhed over Lazarus, and vvas gather'd up by an Angel, vvho put it in a little Cryſtal Vial, and made a Preſent of it to Mary Magdalene. […] It is in the Poſſeſſion of a Benedictin Convent, vvhich raiſes a conſiderable Revenue out of the Devotion that is paid to it, and has novv retain'd the learnedſt Father of their Order to vvrite in its Defence.

lawTo engage or hire (someone), especially temporarily.

• It is vvell knovvn thou retaineſt thy Lavvyers by the Year, ſo a freſh Lavv-Suit adds but little to thy Expences; […]
• "Mr. Pickwick is the defendant in Bardell and Pickwick, Serjeant Snubbin," said Perker. / "I am retained in that, am I?" said the Sergeant. / "You are, Sir," replied Perker.

To keep (someone) in one's pay or service; also, (chiefly historical) to maintain (someone) as a dependent or follower.

• [H]e entruſted the government of the province to Archas Martin and Lupicaire, tvvo mercenary Brabançons, vvhom he had retained in his ſervice.

To control or restrain (oneself); to exercise self-control over (oneself).

archaicTo keep (someone) in custody; to prevent (someone) from leaving.

• There vvith the Nymph his mother, like her thrall; / VVho ſore againſt his vvill did him retaine, / For feare of perill, vvhich to him mote fall, / Through his too ventrous provveſſe proued ouer all.

ChristianityTo declare (a sin) not forgiven.

• Receave the holy gooſt: whoſoevers ſynnes ye remyt⸝ they are remitted vnto them: And whoſoevers ſynnes ye retayne⸝ they are retayned.
• I vvill ſo remit vvrongs, as I may not encourage others to offer them; and ſo retaine them, as I may not induce God to retaine mine to him.

To keep in control or possession; to continue having.

• [T]he ſpirit is exceedingly acid, and may be called a ſtrong and ſour Acetum Minerale; vvereas the fixt nitre has as ſtrong a taſte of ſalt of tartar as the ſpirit has of diſtilled vinegar: and yet theſe tvvo bodies, vvhoſe ſapours are ſo pungent, and ſo differing, do both ſpring from and unite into ſalt-petre, vvhich betrays upon the tongue no heat or corroſiveneſs at all, but coldneſs mixed vvith a ſomevvhat languid reliſh retaining to bitterneſs.
• But an executor of his ovvn vvrong is not allovved to retain: for that vvould tend to encourage creditors to ſtrive vvho ſhould firſt take poſſeſſion of the goods of the deceaſed; and vvould beſides be taking advantage of their ovvn vvrong, vvhich is contrary to the rule of lavv.

To have the ability to keep something in the mind; to use the memory.

• The things that make a good Judge, or good Interpreter of the Lavves, are, […] Fourthly, and laſtly, Patience to heare; diligent attention in hearing; and memory to retain, digeſt and apply vvhat he hath heard.
• Alike, to all the kind, impartial Heav'n / The ſparks of truth and happineſs has giv'n: / VVith ſenſe to feel, vvith memory to retain, / They follovv pleaſure, and they fly from pain; […]

medicinesciencesOf a body or body organ: to hold back tissue or a substance.

obsoleteTo refrain from doing something.

• [T]hey can ſcarce retaine from burſting foorth / In plaine reuolt.

obsoleteTo be a dependent or follower to someone.

• He was reteynyng to Sergius Paulus, whiche was proconſull, that is to ſaye lieutenaunt, or the lorde deputie of that Yland, and was a wyſe man and of good experience.
• VVhen ſoone thoſe other Rils to Seuerne vvhich retaine, / And 'tended not on Teame, thus of themſelues do ſhovve / The ſeruice that to her they abſolutely ovve.

obsoleterareTo continue, to remain.

• No more can impure man retaine and move / In that pure region of a vvorthy love: / Then earthly ſubſtance can unforc'd aſpire, / And leave his nature to converſe vvith fire: […]