Earlier quoted context omitted.
The definition of conservative is conserving the monarchy during the french revolution. From the start it was and remain to this day an ideology for those currently in power to conserve their power.
Oh please, not a single person besides you thinks of "conserving the monarchy during the french revolution" when using the word "conservative" besides you.
While it is overly specific for modern use, it is actually much closer than what the prior poster suggested to the way the term has always been used as a political label and accurate as to its origin as one (more generally, it originally was protecting the power of the aristocracy and religious establishment against the encroachment of bourgeois liberalism; IIRC the liberal/conservative terminology was in use in regard to British politics even prior to the French Revolution, to which it was also applied; the French Revolution is where we get the Left/Right terminology that originally corresponded pretty directly to liberal/conservative though left and liberal have split a bit in more modern use, as the locus of elite power has moved, and liberalism has to a certain extent become associated with status-quo-ism related to that new locus of power), which has always been distinct from how "conservative" is used as anything other than a political label.