nuzzle

Short definition from Wiktionary

Verb

1. 1
   To push or thrust (the nose or snout, face or muzzle, or head, or an object) against or into something.
2. 2
   To rub or touch (someone or something) with the nose, face, etc., or an object.
3. 3
   Chiefly of an animal: to dig (something, especially food) out of the ground using the nose or snout; to root.
4. 4
   Often followed by in or into: to press or push the nose or snout, mouth, face, etc., against or into someone or something; to touch someone or something with the nose or snout, etc.
5. 5
   Chiefly of an animal: to push the nose or snout into the ground to dig for something, especially food; to root, to rootle.
6. 6
   Followed by down: to settle or lie comfortably and snugly in a bed, nest, etc.; to nestle.
7. 7
   Chiefly followed by up or with: to press affectionately against someone or something; to nestle, to snuggle.
8. 8
   To come into close contact with someone or something.
9. 9
   To feel or probe with the fingers.
10. 10
    Often followed by '''up or with: to nurture or train (oneself or someone) to act a certain way, have certain beliefs, etc.
11. 11
    Often followed by '''up or with: to nurture or train (oneself or someone) to act a certain way, have certain beliefs, etc: To train (a dog or hawk) to attack prey.
12. 12
    Chiefly followed by up: to bring up (someone); to foster, to rear; also, to educate (someone); to train.
13. 13
    To care for (someone) affectionately; to hold dear (someone); to cherish, to nurse; also, to provide (someone or something) a comfortable and snug place to settle or lie (compare etymology 1, verb sense 2.3).

Noun

1. 1
   An act of nuzzling (all verb senses).