1. (n.) An opening or cavity, specifically that connecting to the nasal cavity\.

2. (n.) An opening; a hollow; a bending.

3. (n.) A bay of the sea; a recess in the shore.

4. (n.) A cavity; a depression.

5. (n.) A cavity in a bone or other part, either closed or with a narrow opening.

6. (n.) A dilated vessel or canal.

7. (n.) A narrow, elongated cavity, in which pus is collected; an elongated abscess with only a small orifice.

8. (n.) A depression between adjoining lobes.

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