1. in the sense of engaged in
- engaged in
- occupied (in)
- employed in
- involved in
- labouring at
- working at
- slaving at
- toiling at
- wrapped up (in/with)
- hard at work (on)
- hard-pressed
- rushed off one's feet (with)
- at work (on)
- time-poor
- absorbed in
- on the job
- immersed in
- engrossed in
- active (in)
- preoccupied with
- industrious
- lively
- energetic
- bustling
- busy as a bee
- tireless
- hard at it
- on the go
- have one's hands full
- on the hop
2. in the sense of 2, strenuous
- hectic
- strenuous
- active
- energetic
- exacting
- lively
- full
- tiring
- crowded
- eventful
- swarming
- bustling
- astir
- teeming
- thronged
- buzzing
- vibrant
- thronging
- buzzy
3. in the sense of unavailable
- otherwise engaged
- unavailable
- occupied
- engaged
- working
- in a meeting
- on duty
- at work
- in harness
- on active service
- tied up
4. in the sense of excessively ornate
- over-ornate
- excessively ornate
- over-embellished
- over-elaborate
- overblown
- overdecorated
- overwrought
- overripe
- overdone
- exaggerated
- fussy
- florid
- contrived
- cluttered
- over-detailed
- overworked
- laboured
- strained
- rococo
- baroque
- like Piccadilly Circus
- heaving
5. in the sense of occupy
Example Sentences of Busy
1. I am very busy today.
2. Her schedule is extremely busy.
3. Busy days can be overwhelming.
4. He stays busy with work.