1. To an exceedingly great extent or degree
   "He had vastly overestimated his resources"
   - immensely, colossally, gigantically

See also: vast

• true cedar
• true dwarf
• true fir
• true flycatcher
• true frog
• true fungus
• true glottis
• true guava
• true heath
• true jasmine
• true laurel
• true lobster
• true lover's knot
• true mahogany
• true marmoset
• true north
• true pepper
• true pine
• true puffball
• true rib
• true sago palm
• true sandalwood
• true seal
• true senna
• true slime mold