- a system of supports beneath a wall or the like.
- Often underpinnings. a foundation or basis: to uncover the emotional underpinnings of an illness.
- underpinnings, Informal.
- underwear, especially women’s underwear.
- the legs.
verb (used with object), un·der·pinned, un·der·pin·ning.
- to prop up or support from below; strengthen, as by reinforcing a foundation.
- to replace or strengthen the foundation of (a building or the like).
- to furnish a foundation for; corroborate: The author’s conclusions are underpinned by references to experimental findings.
- a structure of masonry, concrete, etc, placed beneath a wall to provide support
verb -pins, -pinning or -pinned (tr)
- to support from beneath, esp by a prop, while avoiding damaging or weakening the superstructureto underpin a wall
- to give corroboration, strength, or support to
n.late 15c., “action of supporting or strengthening from beneath,” from under + present participle of pin (v.). Figurative sense of “prop, support” is recorded from 1580s. v.1520s (figurative); 1530s (literal), from under + pin (v.). Related: Underpinned; underpinning.