zdict is a command line utility, it DOES need some completion scripts.
Install with antigen
Use antigen to install this zsh plugin
source path-to-antigen-script/antigen.zsh antigen bundle zdict/zdict.sh antigen apply
Completion Script
Prepare a folder for zsh completion scripts, e.g.
$HOME/.completions
Make sure completion folder is in
$fpath
# In your .zshrc fpath=($HOME/.completions $fpath)
Put
_zdict
into completion folder
Query helper with tmux
# In your .zshrc source path-to-plugin-script/zdict.plugin.zsh