To start or begin.
Synonym Discussion of COMMENCE. begin, commence, start, initiate, inaugurate, usher in mean to take the first step in a course, process, or operation. begin, start, and commence are often interchangeable. 1 The country has commenced preparations for war. 2  Dear God, I thought, I've been infected by an earworm. 3  My friend the Longhair says that's what you call songs that burrow into your head and commence chewing your brains. 2. commence-set in motion, cause to start; The U.S. started a war in the Middle East; The Iraqis began hostilities; begin a new chapter in your life. lead off, start, begin. jumpstart, jump-start-start or re-start vigorously; The Secretary of State intends to jumpstart the Middle East Peace Process. These are my enticements, and they are sufficient to conquer all fear of danger or death and to induce me to commence this laborious voyage with the joy a child feels when he embarks in a little boat, with his holiday mates, on an expedition of discovery up his native river. Synonyms and Antonyms of COMMENCE. 1. Synonyms commence, embark (on or upon), enter (into or upon), fall (to), get off, kick off, launch, lead off, open, start, strike (into). commence. English Collins Dictionary-English Definition & Thesaurus &nbsp. commence begin, embark on, enter upon, get the show on the road (informal) inaugurate, initiate, open, originate, start Antonyms bring or come to an end, cease, complete, conclude, desist, end, finish, halt, stop, terminate, wind up.  1 The festivities will commence with a parade. 2  Their contract commences in January. 3  The court commenced criminal proceedings. 4  The country has commenced preparations for war. 1 The country has commenced preparations for war. 2  Dear God, I thought, I've been infected by an earworm. 3  My friend the Longhair says that's what you call songs that burrow into your head and commence chewing your brains. commence vb to start or begin; come or cause to come into being, operation, etc. (C14: from Old French comencer, from Vulgar Latin cominitiare (unattested), from Latin com- (intensive) + initiare to begin, from initium a beginning) ♦ commencer n. English Collins Dictionary-English Definition & Thesaurus &nbsp. commence begin, embark on, enter upon, get the show on the road (informal) inaugurate, initiate, open, originate, start Antonyms bring or come to an end, cease, complete, conclude, desist, end, finish, halt, stop, terminate, wind up. 1 The policy would commence not only with the limiting of permits for the building of hotels and boats but with supervision—through expert architectural advice—of the construction of these boats and hotels … —William Styron, This Quiet Dust and Other Writings, (1953) 1982. 1 The country has commenced preparations for war. 2  Dear God, I thought, I've been infected by an earworm. 3  My friend the Longhair says that's what you call songs that burrow into your head and commence chewing your brains. 2. commence-set in motion, cause to start; The U.S. started a war in the Middle East; The Iraqis began hostilities; begin a new chapter in your life. lead off, start, begin. jumpstart, jump-start-start or re-start vigorously; The Secretary of State intends to jumpstart the Middle East Peace Process. embark on, start up, start. commence, lead off, start, begin-set in motion, cause to start; The U.S. started a war in the Middle East; The Iraqis began hostilities; begin a new chapter in your life. inaugurate, kick off-commence officially. Associated concepts: commence a prosecution, commence a suit, commence by filing, commence by summons, commencement of a proceeding, commencement of a suit, commencement of a trial, commencement of action, duly commenced See also: embark, initiate, originate, preface, stem, undertake. 
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commence definition