[com.mem.o.rate] vt -rat.ed ; -rat.ing [L commemoratus, pp. of commemorare, fr. com- + memorare to remind of, fr. memor mindful--more at memory] (1599) 1: to call to remembrance
2: to mark by some ceremony or observation: observe
3: to serve as a memorial of "a plaque that ~s the battle" syn see keep -- com.mem.o.ra.tor n