Definify.com

Webster 1913 Edition

Heartstring

Heart′stringˊ

(härt′strĭngˊ)

,

Noun.

A nerve or tendon, supposed to brace and sustain the heart.

Shak.

Sobbing, as if a

heartstring

broke.

Moore.

Definition 2024

heartstring

heartstring

English

Noun

heartstring ‎(plural heartstrings)

singular of heartstrings
- 2011, Jeph Jacques, Questionable Content, April 21, 2011
  Okay, okay. Untie him before Hannelore busts a heartstring.