Refers to the line or point where two pieces of material are joined, especially in sewing, woodworking, or metalworking.
This seam has started to come undone.
Apply glue to the joint of the boards.
Compound of 接ぎ (hagi, the continuative form of 接ぐ 'to join') + 目 (me, 'eye' or 'point'), literally 'joining point'.