Noun rub has 2 senses
  1. hang-up, hitch, rub, snag - an unforeseen obstacle
    --1 is a kind of obstacle, obstruction
  2. rub, wipe - the act of rubbing or wiping; "he gave the hood a quick rub"
    --2 is a kind of contact
    --2 has particulars: scuff
    Derived forms: verb rub3, verb rub1
,Verb rub has 3 senses
  1. rub - move over something with pressure; "rub my hands"; "rub oil into her skin"
    --1 is one way to
    guide, run, draw, pass
    Derived forms: noun rub2, noun rubbing3
    Sample sentences:
    They rub the cake with sugar
    They rub sugar over the cake
  2. rub, fray, fret, chafe, scratch - cause friction; "my sweater scratches"
    --2 is one way to touch, adjoin, meet, contact
    Derived form: noun rubbing1
    Sample sentences:
    Something ----s
    Something is ----ing PP
    Something ----s somebody
  3. rub, scratch, itch - scrape or rub as if to relieve itching; "Don't scratch your insect bites!"
    --3 is one way to irritate
    Derived form: noun rub2
    Sample sentences:
    Something ----s
    Somebody ----s something
    Something ----s somebody
    Something ----s something