The Collaborative International Dictionary of English v.0.48:

Crouch \Crouch\ (krouch; 129), v. i. [imp. & p. p. Crouched
   (kroucht); p. pr. & vb. n. Crouching.] [OE. cruchen,
   crouchen, crouken; cf. E. creep, G. krauchen, kriechen, or E.
   crook to bend, also crouch to cross.]
   1. To bend down; to stoop low; to lie close to the ground
      with the logs bent, as an animal when waiting for prey, or
      in fear.
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            Now crouch like a cur.                --Beau. & Fl.
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   2. To bend servilely; to stoop meanly; to fawn; to cringe. "A
      crouching purpose." --Wordsworth.
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            Must I stand and crouch
            Under your testy humor?               --Shak.
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The Collaborative International Dictionary of English v.0.48:

Crouch \Crouch\, v. t. [OE. cruchen, crouchen, from cruche,
   crouche, cross. Cf. Crosier, Crook.]
   1. To sign with the cross; to bless. [Obs.] --Chaucer.
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   2. To bend, or cause to bend, as in humility or fear.
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            She folded her arms across her chest,
            And crouched her head upon her breast. --Colerige.
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WordNet (r) 3.0 (2006):

crouch
    n 1: the act of bending low with the limbs close to the body
    v 1: bend one's back forward from the waist on down; "he
         crouched down"; "She bowed before the Queen"; "The young
         man stooped to pick up the girl's purse" [syn: crouch,
         stoop, bend, bow]
    2: sit on one's heels; "In some cultures, the women give birth
       while squatting"; "The children hunkered down to protect
       themselves from the sandstorm" [syn: squat, crouch,
       scrunch, scrunch up, hunker, hunker down]