Entry 1 sense Webster, 1913 Spender /spĕn'-dẽr/ · Spen·der · IPA /ˈspɛndɚ/ 01 n. One who spends; esp., one who spends lavishly; a prodigal; a spendthrift. 1. One who spends; esp., one who spends lavishly; a prodigal; a spendthrift.