A list of words isn’t a dictionary. What a dictionary adds over a list of words is all the relationships between the words needed to interpret them and use them, and all of that is in the weights.
In the current versions of FreeBSD, NetBSD, DragonFlyBSD, Illumos, and Debian, it is still /usr/share/dict .
* https://cgit.freebsd.org/src/tree/share/dict/
* https://cvsweb.netbsd.org/bsdweb.cgi/src/share/dict/
* https://gitweb.dragonflybsd.org/?p=dragonfly.git;a=tree;f=sh...
* https://cvsweb.openbsd.org/src/share/dict
* https://refspecs.linuxfoundation.org/FHS_3.0/fhs/ch04s11.htm...
* https://packages.debian.org/sid/all/wbritish/filelist
Amusingly for https://en.wikipedia.org/wiki/Special:Diff/325776830 , the last place to use /usr/dict (Debian, which changed it in 1998; Berkeley having changed it in Net/2 in 1991) stopped doing so years before Wikipedia was invented.