D7Reamers:
What an LEO thinks of your tool is irrelevant. It's what the courts say that matters. An LEO may arrest you for having your knife concealed, but if the courts consider the knife a tool and not a weapon it was never a weapon in the eyes of the law. What counts is the law, as written, and the judgements of the courts. LEO's opinions are not necessarily any more valid than yours, but they can just arrest you for them.
I guess it comes down to: Why are you nervous about carrying your knife (the general you, not the specific)? If there is a reason to be nervous, examine it and find out if the carry is still worth the nerves. I carry two and I have no doubts that some cop with more donuts than brains would hassle me about them, but I don't do stupid things with them like brandish or threaten or otherwise call attention to them. I also don't go out of my way to conceal them (just plain ol' pocket clips). So I don't have any worries. *I* can live with the (perceived) extremely unlikely possibility of a concealed weapons arrest. What the original poster has to ask himself is, can he?
Now to answer the posters question:
The only things automatically considered weapons by Canadian law are defined in the code. A weapon, paraphrased, is defined as anything listed as a restricted or prohibited weapon, any firearm, or any object designed (or whose primary purpose is) to cause injury or death [to a human]. At the same time, anything actually used as a weapon is a weapon regardless of what its designed intent is; if you shiv someone with a screwdriver it's still an assault with a weapon.
Intent also matters. So, if stopped, always have a ready answer for why that 9" bowie is concealed. That answer had better not be "self defense". If you want to carry the bowie for self defense (and admit it to the police), don't conceal it. Also be careful of running afoul of the "bringing a weapon to a public meeting" offense. Public meeting not being defined by law.
Pierre