hi-fi 
(hīfī)
(hīfī)n. pl. hi-fis
Informal
Informal
1. High fidelity.
2. An electronic system for reproducing high-fidelity sound from radio or recordings.
[HI(GH) + FI(DELITY).]
hi-fi adj.
- on (one's) own initiative
- on one's own initiative
- on (one's) radar/radar screen
- on one's radar screen
- on one's radar screen
- on (one's) soapbox
- on one's soapbox
- on (one's)/the way
- on (one's) /the way
- on one's the way
- on (one's) toes
- on one's toes
- on (one's) uppers
- on one's uppers
- on one's way
- on one/the onehand
- on order
- on own
- on own account
- on own ground
- on own hook
- on own initiative
- on pain of
- on paper
- on pins and needles