Now, first of all, I'm not picking on the Macquarie Dictionary per se, but the definition I just read for astrology both made me smile bemusedly and then laugh.

Here goes:

astrology
astrologer, astrologist, noun. astrological /astruh'lojikuhl/, astrologic, adjective. astrologically, adverb.
/uhs'troluhjee/.
noun
1. a study which assumes, and professes to interpret, the influence of the heavenly bodies on human affairs.
2. Obsolete astronomy.
[Middle English, from Latin astrologia, from Greek. See astro-, -logy]
 

Assumes? Professes to interpret? Wow, talk about a judgement call!

I just had to share this one and will be on the lookout for any further definitions that profess to be impartial!