Colloid, in chemistry definition is a heterogenous
mixture, of one substance is different from another, when mixed, either of the
substance (particularly the solid one), is evenly mixed with each other. It
could clearly be seen when one mixes a solution in a suspension state because
it forms a cloudy solution, however, in like suspension, it does not settle at
the bottom of the mixture. Best example of this is milk. When you mix milk
powder to a hot water, the solution is mixed evenly however the color of the
water from transparent changes to milkish white.
