lock in

Short definition from Wiktionary

Verb

1. 1
   To secure (someone or something) in a locked enclosure.
2. 2
   To fix the value of (something potentially variable).
3. 3
   To prevent (someone or something) from escaping, deteriorating, or switching to an alternative.
4. 4
   To synchronize (especially a rhythm section) into a groove.
5. 5
   To focus entirely (on something).

Noun

1. 1
   Nonstandard spelling of lock-in.
2. 2
   A sleepover party, usually held in a public place such as a church or school, in which the participants are not allowed to leave until the next morning.
3. 3
   An illegal but widely-tolerated invitation-only gathering in a British pub, after the end of licensing hours, to allow regular customers the opportunity to enjoy further drinking time.
4. 4
   A situation in which members of an industry have agreed to adopt a certain standard and have retooled their production to meet this standard, thus making it very costly to change to a different standard.
5. 5
   The situation where an investor cannot trade without incurring an undesirable penalty such as taxation.