Verb rein in has 3 senses
  1. rein, rein in - stop or slow up one's horse or oneself by or as if by pulling the reins; "They reined in in front of the post office"
    --1 is one way to stop, halt
    Sample sentences:
    Something ----s
    Somebody ----s
    Something is ----ing PP
    Somebody ----s PP
  2. harness, rein in, draw rein, rein - control and direct with or as if by reins; "rein a horse"
    --2 is one way to control, command
    Sample sentence:
    Somebody ----s something
  3. rein, rein in - stop or check by or as if by a pull at the reins; "He reined in his horses in front of the post office"
    --3 is one way to stop
    Sample sentence:
    Somebody ----s something
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