#1
substitute v. [
replace, interchange, exchange] put in the place of another; switch seemingly equivalent items; "the con artist replaced the original with a fake Rembrandt"; "substitute regular milk with fat-free milk"; "synonyms can be interchanged without a changing the context's meaning"
. wn #2
substitute n. [
replacement] a person or thing that takes or can take the place of another
. wn #3
substitute v. [
sub, stand in, fill in] be a substitute; "The young teacher had to substitute for the sick colleague"; "The skim milk substitutes for cream--we are on a strict diet"
. wn #4
substitute n. [
reserve, second-stringer] an athlete who plays only when a starter on the team is replaced
. wn #5
substitute n. [
stand-in, relief, reliever, backup, backup man, fill-in] someone who takes the place of another (as when things get dangerous or difficult); "the star had a stand-in for dangerous scenes"; "we need extra employees for summer fill-ins"
. wn