`lookupviewservice` eats a lot memory After a while, lookupviewservice will occurred and use more than 2G memory (even more than this after a few days). I have to end the process manually, but after a while, it comes up again, even though I have never used the Dictionary app.

What is this caused by? There might be memory leakage with this app, but how can I prevent this?

My laptop is Macbook Pro with 10.10.2.
I have the same problem. As I don't care about the Dictionary lookup service I disabled it. In System Preferences : Trackpad : Point &amp; Click, I unchecked "Lookup &amp; data detectors" and also "Force click and haptic feedback". Then I force quit the LookupViewService processes which Activity Monitor showed using a lot of Real Mem. Hope this helps.