busy // adjective (busier, busiest)

1

having a lot of work to do; not free to do sth else because you are working on sth:

I'm afraid Mr Endo is busy at the moment. Can I get him to call you back?

I'm too busy to go to the meeting.

2

spending a lot of time on sth:

This month the team have been busy making presentations to potential investors.

3

full of people, activity, vehicles, etc:

one of Europe's busiest airports

4

full of work and activity:

Have you had a busy day?

Summer is our busiest season.

I've got a busy schedule this week.

5 = ENGAGED:

The line is busy-I'll try again later.

I just get the busy signal when I call.

• one-time-only
• one-to-one
• one-way
• on-lend
• online
• o.n.o.
• ONS
• on-screen
• onshore
• onside
• on-site
• on-the-job
• on-the-job training
• OOS
• OPEC
• open
• open account
• open bid
• open-book management
• open border
• open cheque
• open communication
• open-door policy
• open-ended
• opening