1.
fixing in place, securing
Making something stationary or immovable by attaching or fastening it. Also used figuratively for establishing something as unchanging.
ねじで固定する。
Secure it with screws.
棚を壁に固定した。
I fixed the shelf to the wall.
この席は固定されているので動かせない。
These seats are fixed in place, so they can't be moved.
固定 means to fix or secure something in place so it does not move.
COMMON COLLOCATIONS:
- 固定する (to fix, to secure)
- 固定される (to be fixed/secured)
- 固定電話 (landline phone — literally "fixed telephone")
- 固定費 (fixed costs)
- 固定資産 (fixed assets)
The opposite is 移動 (moving, portable).