What is the meaning of Leech?

An aquatic blood-sucking annelid of subclass Hirudinea, especially Hirudo medicinalis.

A person who derives advantage from others in a parasitic fashion.

A glass tube designed for drawing blood from damaged tissue by means of a vacuum.

To apply a leech medicinally, so that it sucks blood from the patient.

To drain (resources) without giving back.

A physician.

A healer.

To treat, cure or heal.

The vertical edge of a square sail.

The aft edge of a triangular sail.

light, not heavy

easy, not difficult

physician

low

empty

Source: wiktionary.org