NOUN (1)

1. a portrait showing the body from only the waist up;


ADJECTIVE (2)

1. representing only the upper half of the body;
- Example: "a half-length portrait"

2. abridged to half its original length;

The Collaborative International Dictionary of English v.0.48:

Half-length \Half"-length`\ (-l[e^]ngth`), a.
   Of half the whole or ordinary length, as a picture.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

abridged \abridged\ adj.
   1. 1 shortened by condensing or rewriting; -- said of texts:
      an abridged version [Narrower terms: half-length]
      unabridged, full-length

   Syn: condensed
        [WordNet 1.5 +PJC]

WordNet (r) 3.0 (2006):

half-length
    adj 1: representing only the upper half of the body; "a half-
           length portrait"
    2: abridged to half its original length
    n 1: a portrait showing the body from only the waist up