To connect or integrate with a larger system, network, or plan.
"The new software can tie into your existing database without any reconfiguration."
To connect to or integrate with a larger system; or (informally) to attack or criticize someone sharply.
To connect into something bigger, or to suddenly attack or criticize someone.
2 meanings, ordered from most common to least. Color-coded by CEFR level.
To connect or integrate with a larger system, network, or plan.
"The new software can tie into your existing database without any reconfiguration."
(American English, informal) To attack or criticize someone strongly and suddenly.
"The coach really tied into the players after their sloppy performance in the first half."
The 'connect to a system' sense is common in technical and business writing. The 'attack or criticize' sense is primarily American English informal usage. Context is needed to distinguish between the two very different meanings.
Natural word combinations native speakers use most often.
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