1. [mid-19C] a policeman.
2. [mid-19C+] (also blue) a red-headed person; also as adj.
3. [mid-19C] a ‘navigator’, i.e. a labourer working on the railway [? the blue-steel tracks].
4. [mid-19C+] (UK Und.) lead.
5. [late 19C] a lead worker [abbr. bluebed woman, from the blueish colour of cooled molten lead].
6. [late 19C+] (Aus., also blue) a pack [f. the trad. blue blanket that covered a pack].
7. [20C+] (Aus./N.Z., also blue paper) a summons, a traffic ticket.
8. [20C+] a drinker of methylated spirits.
9. [1910s] (Aus.) a blue-tongued lizard.
10. [1910s+] (Aus.) a blue heeler, an Australian cattle dog.
11. [1970s] (UK prison/drugs) any form of amphetamine-barbiturate mixture.
12. [1990s+] a £5 note.
13. (Aus.) any form of repimand, e.g. a referee’s warning to a sports competitor.
14. [1990s+] see blue n.1 (2g)
15. [1990s+] (Aus. prison) a police warrant.
1. [late 19C+] (Aus.) to carry a pack.
2. [1900s] (Aus.) to leave, to move on.