hp.

hp. or hp (no period),

1. half pay.

2. high pressure.

3. horsepower.

h.p.,

1. half pay.

2. high pressure.

3. hire-purchase.

4. horsepower.

H.P. or HP (no periods),

an abbreviation for:

1. high power.

2. high pressure.

3. hire-purchase.

4. horsepower.

5. House of Parliament.