Pronunciation: (fas'un, fä'sun),[key] —v.t. 1. to attach firmly or securely in place; fix securely to something else.
2. to make secure, as an article of dress with buttons, clasps, etc., or a door with a lock, bolt, etc.
3. to enclose securely, as a person or an animal (usually fol. by in): to fasten a monkey in a cage. 4. to attach, associate, or connect: to fasten a nickname on someone. 5. to direct (the eyes, thoughts, etc.) intently: to fasten one's eyes on a speaker.
—v.i. 1. to become fast, fixed, or firm.
2. to close firmly or securely; lock: This clasp won't fasten. 3. to take a firm hold; seize (usually fol. by on or upon): to fasten on an idea. 4. to focus attention; concentrate (usually fol. by on or upon): His gaze fastened on the jewels.