—v.t. 1. to place between; cause to intervene: to interpose an opaque body between a light and the eye. 2. to put (a barrier, obstacle, etc.) between or in the way of.
3. to put in (a remark, question, etc.) in the midst of a conversation, discourse, or the like.
4. to bring (influence, action, etc.) to bear between parties, or on behalf of a party or person.
—v.i. 1. to come between other things; assume an intervening position or relation.
2. to step in between parties at variance; mediate.
3. to put in or make a remark by way of interruption.