The term 'ตลอดจน (dtà-lɔ̀ɔt jon)' is a conjunction used in Thai language to indicate the progression of an action or situation from its beginning until its end. It can also be used to depict the extension of a certain entity from one point to another. The use of 'ตลอดจน' is equivalent to the English phrases 'throughout until' or 'all the way to', therefore it is commonly used in sentences expressing time or distance.