A Quick and Simple Dictionary

plumb

1. Adjective.  truly vertical.
2. Adjective.  (cricket) Describing an LBW where the batsman is hit on the pads directly in front of his wicket and should be given out.
3. Adverb.  In a vertical direction.
4. Adverb.  (informal) Squarely, directly; completely.
5. Noun.  A little mass of lead, or the like, attached to a line, and used by builders, etc., to indicate a vertical direction.
6. Noun.  (nautical) A weight on the end of a long line, used by sailors to determine the depth of water.
7. Verb.  To determine the depth, generally of a liquid; to sound.
8. Verb.  To attach to a water supply and drain.
9. Verb.  To think about or explore in depth, to get to the bottom of, especially '''''to plumb the depths of'''''.
10. Verb.  To use a plumb bob as a measuring or aligning tool.
11. Verb.  To accurately align vertically or horizontally.
12. Verb.  (dated) To seal something with lead.
13. Verb.  (intransitive) To work as a plumber.
14. Verb.  (rare) To fall or sink like a plummet.
15. Verb.  (US, colloquial) To trace a road or track; to follow it to its end.
16. Verb.  (nautical) To position vertically above or below.