ADVERB (3)

1. fitting closely;
- Example: "the vest fit snugly"

2. safely protected;
- Example: "concealed snugly in his hideout"

3. warmly and comfortably sheltered;
- Example: "sitting snugly by the fireside while the storm raged"

The Collaborative International Dictionary of English v.0.48:

Snugly \Snug"ly\, adv.
   In a snug manner; closely; safely.
   [1913 Webster]

WordNet (r) 3.0 (2006):

snugly
    adv 1: fitting closely; "the vest fit snugly"
    2: safely protected; "concealed snugly in his hideout"
    3: warmly and comfortably sheltered; "sitting snugly by the
       fireside while the storm raged"