Definition of senhorita in English:
 senhorita
noun ˌsɛnjəˈriːtəˌsānyəˈrēdəˌsenyəˈrēdə
(in Portuguese-speaking countries) a young woman, especially an unmarried one (often used as a title or polite form of address).
 Example sentencesExamples
-  Fresh from a round of golf and a dinner at which dark-eyed senhoritas competed for his attention.
 -  His team of ‘senhoritas’ brought plates of carpaccio, cold meats, bowls of salads and baskets of bread.
 
Origin
  
Portuguese, diminutive of senhora.
   Definition of senhorita in US English:
 senhorita
nounˌsānyəˈrēdəˌsenyəˈrēdə
(in Portuguese-speaking regions) a young woman, especially an unmarried one (often used as a title or polite form of address).
 Example sentencesExamples
-  Fresh from a round of golf and a dinner at which dark-eyed senhoritas competed for his attention.
 -  His team of ‘senhoritas’ brought plates of carpaccio, cold meats, bowls of salads and baskets of bread.
 
Origin
  
Portuguese, diminutive of senhora.