WordNet (r) 3.0 (2006):
soft spot n 1: a place of especial vulnerability [syn: weak part, weak spot, soft spot] [ant: good part] 2: a sentimental affection; "she had a soft spot for her youngest son" 3: any membranous gap between the bones of the cranium in an infant or fetus [syn: fontanelle, fontanel, soft spot]