1. lock in - Noun
2. lock in - Verb
place in a place where something cannot be removed or someone cannot escape
close with or as if with a tight seal
Source: WordNetlock-in
The parents locked her daughter up for the weekend Source: Internet
She locked her jewels in the safe Source: Internet
This vacuum pack locks in the flavor! Source: Internet
A 2000 study of firearm storage in the United States found that "from the homes with children and firearms, 55% reported to have one or more firearms in an unlocked place." 43% reported keeping guns without a trigger lock in an unlocked place. Source: Internet
As a side-effect, the Scandinavian Mountains lock in continental winds from reaching the coastline, causing very cool summers throughout Atlantic Norway. Source: Internet
A longer lock-in clause is recommended. Source: Internet