Plant very similar to the tree with separate branches from the main trunk.
Ex: Ken and Alice are going to the nursery to buy plants for their garden. They're planning on buying some shrubs for the front garden and some flowers for the back garden.
Ex: Many trees cannot grow at high altitude because of the cold weather and strong sunlight. However, a few shrubs, like the shrub rose, can be used in high altitude landscaping.
Shrub is a synonym for bush. There are a lot of expressions with bush. For example, the proverb a bird in the hand is worth two in the bush means that something that is certain is better than an opportunity that may not work out, even if the outcome of the possible situation would be better than the outcome of the guaranteed situation.
Ex: Sally doesn't know what to do; she has got an offer from her second ¬choice job, but she has an interview for the job that she wants the most next week. I have told her that a bird in the hand is worth two in the bush; as she doesn't know if she'll get the other job, it's better to take the offer that she has already.