shelf shelf /ˈʃɛlf/

noun

1. () A support that consists of a horizontal surface for holding objects  ( shelf )
   a support that consists of a horizontal surface for holding objects
    I need to add an extra shelf to my pantry for more storage space
   I need to add an extra shelf to my pantry for more storage space
   
   
2. A projecting ridge on a mountain or submerged under water  ( shelf , ledge )
   a projecting ridge on a mountain or submerged under water
     The rock climber clung to the narrow ledge, carefully navigating the sheer cliff face.
   The rock climber clung to the narrow ledge, carefully navigating the sheer cliff face.
   
   

 shelve shelve /ˈʃɛlv/

verb

1. () Hold back to a later time  ( hold over , prorogue , put over , defer , put off , remit , set back , shelve , table [ N. American] , postpone )
   hold back to a later time
    Let's postpone the exam
   let's postpone the exam
   
2. Place on a shelf  ( shelve )
   place on a shelf
    Shelve books
   shelve books