WordWeb Online

1. A way out of an agreement or difficult situation
   "always write in a let-out clause"

1. Express audibly; make sounds (not necessarily words)
   "She let out a big heavy sigh";
   - utter, emit, let loose
    
2. Make known to the public information that was previously known only to a few people or that was meant to be kept a secret
   "let out the evidence in the murder case";
   - unwrap, disclose, let on, bring out, reveal, discover, expose, divulge, break, give away, uncover, lay bare
    
3. Bring out of a specific state
   - bring out
    
4. Make (clothes) larger
   "Let out that dress--I gained a lot of weight";
   - widen

Derived forms: let out, lets out, letting out, let-outs

Type of: alter, change, let go, let go of, release, relinquish, tell, vary

Antonym: take in