Real Dictionary

take up
phrasal verb: If you take up an activity or a subject, you become interested in it and spend time doing it, either as a hobby or as a career.

take up in American English
to occupy oneself with the study or practice of
to raise; lift

take up in British English
to adopt the study, practice, or activity of

take-up
uncountable noun: Take-up is the rate at which people apply for or buy something which is offered, for example financial help from the government or shares in a company.

take-up in American English
noun: the act of taking up

take-up in British English
modifier: of or relating to the claiming or acceptance of something, esp a state benefit, that is due or available
noun: the claiming or acceptance of something, esp a state benefit, that is due or available