a. scientific knowledge used in practical ways in industry, for example in designing new machines.
b. a period of 100 years.
c. A person who is travelling in a car, bus, train, plane or ship and who is not driving it or working on it.
d. To make detailed arrangements for something you want to do in the future.
e. To ask for a seat, table, room etc. to be available for you or somebody else at a future time.
f. A person who is travelling or visiting a place for pleasure.
g. to make something , especially a building, by putting parts together.