Definition & Meaning of "by"in English

used to indicate the person or entity performing an action 

used to introduce the term that is being explained or defined 

used to indicate the name or title by which someone is called or known 

used to refer to the parent, other than the one speaking 

used to refer to the father of a particular animal, especially in terms of breeding 

used in expressions showing how something occurs 

used to specify the standard or unit used to evaluate or measure something 

used in mathematical operations to show multiplication or division 

used to indicate continuous or sequential occurrence of an action or event 

used to show the basis for categorization or analysis 

used to show when something must be completed or occurs 

used to show the time period in which something occurs 

used to show the proximity or position beside something 

as judged, stated, or approved by someone or something 

used to express emphasis or frustration in a mild exclamation 

used to show recognition or identification based on a description or appearance 

used to show the part of something that is physically handled or held 

used to express someone's occupation, origin, etc. 

used to indicate acting or doing something for someone else 

used to indicate storing or saving something, especially for future use 

at or to someone's residence or location 

near in space 

used to indicate a side road, path, or minor route