Hypertext Webster Gateway: "substituting"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Substitute \Sub"stit"ute\, v. t. [imp. & p. p. {Substituted}; p.
pr. & vb. n. {Substituting}.] [See {Substitute}, n.]
To put in the place of another person or thing; to exchange.
Some few verses are inserted or substituted in the room
of others. --Congreve.
From WordNet (r) 1.7 (wn)
substituting
n : working as a substitute for someone who is ill or on leave
of absence [syn: {subbing}]
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