(transitive) To cut a rabbet in a piece of material.

(in dated typography) A space of non-variable width: ⊣ ⊢ equal to the width of a period (full stop) or comma, inserted after ⟨“⟩ or ⟨‘⟩ and before ⟨”⟩ or ⟨’⟩ (and sometimes ⟨?⟩ or ⟨!⟩), unless a pu...

The Japanese art of repairing broken pottery with lacquer dusted or mixed with powdered gold or similar material, highlighting the cracks instead of disguising them.

(Internet slang, text messaging) Initialism of I don't think so.