"act of pressing and smoothing clothes with a heated flat-iron," 1725, verbal noun from iron (v.). Ironing-board attested from 1762.
Entries linking to ironing
iron v.
c. 1400, irenen, "to make of iron," from iron (n.). Meaning "shackle with irons" is from 1650s. Meaning "press clothes" (with a heated flat-iron) is recorded from 1670s. Related: Ironed; ironing.