You use 'tweak' when you change something a little bit to make it better. It is not a big change, usually a small fix or improvement.
I tweaked the bike to make it faster.
She tweaked the recipe for better taste.
To 'tweak' something as a verb can mean to quickly pull or pinch it. It is a small, sudden action, often to get attention or as a little joke.
He tweaked my arm to get my attention.
The child tweaked the toy's nose playfully.
'Tweak' as a noun means a small change or fix, often to machines or systems, to make them work better or differently.
She made a quick tweak to the engine.
The software update included new tweaks.
This meaning is like pulling or pinching a small part of the body in a quick and light way. It is often used in fun or teasing.
He tweaked her nose for fun.
The boy tweaked his sister’s ear playfully.
'Tweak' means to make small changes to technology or computer programs so they work better or faster. It is a careful and small type of fixing.
They tweaked the app to run faster.
I tweaked the settings on my phone.
To 'tweak' can also mean to hurt yourself slightly by pulling or twisting a joint or muscle. It is a small injury that causes sudden pain.
I tweaked my back lifting the box.
She tweaked her ankle playing tennis.
