WordWeb Online

1. Used in specifying adjacent dimensions
   "a room ten by twenty metres"
    
2. By means of; with aid of; through the act or agency of; "destroyed by fire"
   - through
    
3. In the neighbourhood of, close to
   "my house is by the church"
   - near
    
4. On, in traversing
   "came by the path"
   - along

1. So as to pass a given point
   - past
    
2. In reserve; not for immediate use
   "put something by for her old age"
   - aside, away

Sounds like: buy, bye, bi

Encyclopedia: By, Doubs By By, Norway By, John