early 15c., recordour, "chief legal officer of a city," whose duty is to register writings or transactions, from Anglo-French recordour (early 14c.), Old French recordeor "witness; storyteller; minstrel," from Medieval Latin recordator, from Latin recordari "remember" (see record (v.)). The meaning "registering apparatus" is from 1873.
Latin, literally "in memory of," from accusative of memoria "memory" (from PIE root *(s)mer- (1) "to remember"). The phrase was much-used in Latin writing; Tennyson's poem of that name (published in 1850) seems to have introduced the phrase to English.
mid-15c., "worthy to be remembered, not to be forgotten," from Latin memorabilis "that may be told; worthy of being remembered, remarkable," from memorare "to bring to mind," from memor "mindful of" (from PIE root *(s)mer- (1) "to remember"). Related: Memorably; memorableness.
1580s, "act of recollecting," from Old French reminiscence (14c.) and directly from Late Latin reminiscentia "remembrance, recollection" (a loan-translation of Greek anamnesis), from Latin reminiscentem (nominative reminiscens), present participle of reminisci "remember, recall to mind," from re- "again" (see re-) + minisci "to remember," from root of mens "mind" (from PIE root *men- (1) "to think").
The meaning "a recollection of past incidents, events, conditions, etc. within one's personal knowledge" is attested from 1811; especially, in plural, "the collected memories and experiences (of someone) in literary form." The 17c. also had reminiscency "faculty of reminiscence."
1590s, "having a good memory," from French memorieux or directly from Medieval Latin memoriosus, from Latin memoria (from PIE root *(s)mer- (1) "to remember"). By 1856 (Sir Richard F. Burton, with whom it seems to have been a pet word) as "worthy to be remembered."
mid-14c., "to remember, call to mind, take care to remember," also "to remind oneself," from mind (n.). The Old English verb was myngian, myndgian, from West Germanic *munigon "to remind." Meaning "perceive, notice" is from late 15c.; that of "to give heed to, pay attention to" is from 1550s; that of "be careful about" is from 1737. Sense of "object to, dislike" is from c. 1600. Meaning "to take care of, look after" is from 1690s. Related: Minded; minding.
Negative use "(not) to care for, to trouble oneself with" is attested from c. 1600; never mind "don't let it trouble you" is by 1778; the meiotic expression don't mind if I do is attested from 1847.