1650s, of persons, "inclined to meditation," from Late Latin meditativus, from meditat-, past-participle stem of Latin meditari "to meditate, think over, reflect, consider," frequentative form of PIE root *med- "take appropriate measures." Related: Meditatively; meditativeness.
"intend, have in mind;" Middle English mēnen, from Old English mænan "intend (to do something), plan; indicate (a certain object) or convey (a certain sense) when using a word," from Proto-West Germanic *menjojanan (source also of Old Frisian mena "to signify," Old Saxon menian "to intend, signify, make known," Dutch menen, German meinen "think, suppose, be of the opinion"), from PIE *meino- "opinion, intent" (source also of Old Church Slavonic meniti "to think, have an opinion," Old Irish mian "wish, desire," Welsh mwyn "enjoyment"), perhaps from root *men- (1) "to think."
From late 14c. as "have intentions of a specified kind" (as in to mean well). Of a person or thing, "to be of some account, to matter (to)," by 1888. Conversational question you know what I mean? attested by 1834.
1550s, "an abnormality of growth," from Late Latin monstrositas "strangeness," from Latin monstrosus, a collateral form of monstruosus (source of French monstruosité), from monstrum "divine omen, portent, sign; abnormal shape; monster, monstrosity," figuratively "repulsive character, object of dread, awful deed, abomination," from root of monere "to admonish, warn, advise," from PIE *moneie-"to make think of, remind," suffixed (causative) form of root *men- (1) "to think."
Earlier form was monstruosity (c. 1400). Sense of "state or quality of being monstrous" is first recorded 1650s. Meaning "a monster" is attested from 1640s.
1950, coined by U.S. writer L. Ron Hubbard (1911-1986). In "Dianetics: The Modern Science of Mental Health" (1950), the glossary connects the word to Greek dianoua "thought." "Self Analysis" by Hubbard (1951) quotes an etymology said to have been added to the Funk & Wagnalls New Standard Dictionary: "Gr. dianoetikos--dia, through plus noos, mind."
There was an earlier dianoetic (1670s) "of or pertaining to thought," from Greek dianoetikos "of or for thinking; intellectual," from dianoetos, verbal adjective from dianoe-esthai "to think," from dia- "through" (see dia-) + noe-ein "to think, suppose," from noos "mind," which is of uncertain origin.
an auxiliary verb in future indicative, now archaic or dialectal, "shall, will," late 12c., from Old Norse monu, a future tense auxiliary verb ultimately meaning "to intend," ultimately from the PIE root *men- (1) "to think."
c. 1300, mencioun, "a note, a reference, a calling to mind by speech or writing," from Old French mencion "mention, memory, speech," from Latin mentionem (nominative mentio) "a calling to mind, a speaking of, a making mention," from root of Old Latin minisci "to think," related to mens (genitive mentis) "mind," from PIE root *men- (1) "to think." From late 15c. as "statement about or in reference to a person or thing," which by mid-18c. had diminished to "incidental or casual reference," though in military use a mention in the dispatches remained an important thing.