com·mence (kə-měns') v. com·menced, com·menc·ing, com·menc·es v. tr. To begin; start. v. intr. To enter upon or have a beginning; start. See Synonyms at begin. [Middle English commencen, from Old French comencier, from Vulgar Latin *cominitiāre : Latin com-, intensive pref.; see com- + Late Latin initiāre, to begin (from Latin initium, beginning; see ei- in Indo-European roots).] com·menc'er n. |