note (v.) Look up note at Dictionary.com
early 13c., "observe, mark carefully," from O.Fr. noter, from L. notare, from nota "letter, note," originally "a mark, sign," possibly an alteration of Old L. *gnata, infl. by gnoscere "to recognize." Meaning "to set in writing" is from c.1400. The noun is first attested c.1300, in the musical sense; meaning "brief writing" is from 1540s. Notebook is first attested 1570s; noteworthy is from 1550s.