enter in WordNet English dictionary

1. take on duties or office
   "accede to the throne"
   accede  enter 
   
2. to come or go into
   "the boat entered an area of shallow marshes"
   enter  come in  get into  get in  go into  go in  move into 
   
3. set out on (an enterprise or subject of study)
   "she embarked upon a new career"
   embark  enter 
   
4. register formally as a participant or member
   "The party recruited many new members"
   enroll  inscribe  enter  enrol  recruit 
   
5. make a record of; set down in permanent form
   record  enter  put down 
   
6. become a participant; be involved in
   "enter a race"; "enter an agreement"; "enter a drug treatment program"; "enter negotiations"
   enter  participate 
   
7. put or introduce into something
   "insert a picture into the text"
   insert  infix  enter  introduce 
   
8. come on stage
   enter 
   
9. be or play a part of or in
   "Elections figure prominently in every government program"; "How do the elections figure in the current pattern of internal politics?"
   figure  enter