Tadā (adv.) [Vedic; cp. kadā] then, as that time (either past or future) D ii.157; J ii.113, 158; Pv i.105; PvA 42. Also used like an adj.: te tadā -- mātāpitaro etarahi m˚ ahesuŋ "the then mother & father" J i.215 (cp. Lat. quondam); tadā -- sotāpanna -- upāsaka J ii.113.

Pali-English Dictionary, TW Rhys Davids, William Stede,

de tshe

[translation-san] {C} tadā

[translation-san] {C} velā

[translation-san] {C} tatu (=tadā)

[translation-eng] {Hopkins} at that time

[translation-eng] {C} then; occasion; from that

Jeffrey Hopkins' Tibetan-Sanskrit-English Dictionary

de las

[translation-san] {C} tatu (=tadā)

[translation-eng] {C} then; from that

Jeffrey Hopkins' Tibetan-Sanskrit-English Dictionary

de'i tshe

[translation-san] {C} tadā

[translation-san] velā

[translation-san] {C} (tatra-)avasthāyām

[translation-eng] {Hopkins} at that time

[translation-eng] {C} then; occasion; thereupon

Jeffrey Hopkins' Tibetan-Sanskrit-English Dictionary