That is getting pretty specialized, and will almost certainly will require custom code – either PHP or possibly as a plugin. The proper way to do custom PHP is with a child theme, where you could possibly use the wp_title filter to change the <title>. Weaver uses the default <title> automatically generated by WordPress. You could add a filter to the child functions.php file.
Creating custom code for <meta> tags would have to happen in the header.php child code. Or, there are a number of plugins that can generate custom <meta> tags in the site header. There is at least one plugin that can generate a custom <title>. But I don’t know if any of these can determine the exact context to create ‘Definition for “dog”‘ for example.
I suspect to get exactly what you want, you will need to have fairly complicated PHP code (in a child functions.php) to create the exact title you might want.