Synonym: in that, in this. Similar words: wherein, interfere in, rein, reins, reinvest, reindeer, figure in, reinforce. Meaning: [‚ðer'ɪn /‚ðeər'ɪn] 
adv. (formal) in or into that thing or place.
adv. (formal) in or into that thing or place. 
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1 See Thompson, 1983, and the references cited therein.
2 Therein lies the crux of the matter.
3 There's the rub / Therein lies the rub.
4 He works extremely hard and therein lies the key to his success.
5 The treaty was imposed by force, and therein lay the cause of its ineffectiveness.
6 Therein lay the seed of ultimate triumph.
7 And therein lies the fatal flaw.
8 And therein lies a Daley legend.
9 Therein lies a miracle of distribution.
10 Therein lies the advantage of the default action.
11 And therein lies a problem,[www.Sentencedict.com] a particularly pertinent one in an era of feminist sensitivity.
12 Therein probably lies the potency of the Gaullist concept of state broadcasting.
13 It is good to love many things, for therein lies the true strength, and whosoever loves much performs much, and can accomplish much, and what is done in love is well done. Vincent van Gogh 
14 Therein may lie a problem for the owners of set-top boxes[sentencedict.com], however.
15 It may be argued that therein lies evolutionary justification for the belief that some modified form of such living can suit humans.
16 And therein, I think, lies the true fascination of the 100 metres.
17 By burning tree branches, pine needles, and pine cones, many not only warm their houses but improve the smell therein.
18 Her book is simply a collection of memories, told without conceit or self-absorption - and therein lies its power.
19 In court she denied any knowledge of the article and the allegations made therein.
20 The insurance policy covers the building and any fixtures contained therein.
21 Santa Maria di Castellabate is barely mentioned in guidebooks; therein lies its charm.
22 It is a thrilling tale of a haunted house and the ghosts therein.
23 Afternoon groups relate to the specific addictions and problems therein.
24 Bayezid subsequently made amends by building a mosque in front of his palace and appointed a place for himself therein.
25 Nothing so tempts us to believe outright lies and unfounded stories posing as science than the sensationalistic schlock therein.
26 As in other bowerbirds, the male builds an elaborate bower of twigs and ferns and therein tries to seduce females.
27 I remember not being able to stand outside a phone kiosk any longer and dragging out a man who was obviously gossiping therein.
28 To provide financial information useful for determining and predicting the economic condition of the governmental unit and changes therein.
29 She is not afraid of the outside world, but recognizes its beauty, and therein lies a danger.
30 More importantly, the adoption of these practices made the individual worker feel insignificant. Therein lies the problem.
More similar words: wherein, interfere in, rein, reins, reinvest, reindeer, figure in, reinforce, reinvent, reinforced, reinstate, reincarnate, reinforcing, reintroduce, reinvestment, reinvigorate, reinforcement, reincarnation, reinvigorated, take pleasure in, sovereign, sovereignty, temperature inversion, lose interest, simple interest, come into being, einstein, albert einstein, here and there, reign.