commute

from The American Heritage® Dictionary of the English Language, 5th Edition.

• intransitive verb To travel as a commuter.
• intransitive verb To make substitution or exchange.
• intransitive verb To serve as a substitute.
• intransitive verb To pay in gross, usually at a reduced rate, rather than in individual payments.
• intransitive verb Mathematics & Logic To satisfy a commutative property. If a × b = b × a, then a commutes with b, regardless of whether the operation indicated by × is commutative.
• intransitive verb To substitute (one thing for another); exchange.
• intransitive verb To change (a penalty, debt, or payment) to a less severe one.
• noun An act or instance of commuting, especially the trip made by a commuter.

from The Century Dictionary.

• To exchange; put in the place of another (thing or person); give or receive for another; substitute another thing for.
• Specifically— To exchange one penalty or punishment for another of less severity.
• To substitute one sort of burden for another; especially, to substitute money payment for payment in kind or the performance of a compulsory duty: as, to commute tithes.
• In electricity, to regulate (the direction of an electrical current) as by a commutator.
• To serve as a substitute.
• To pay in money instead of in kind or in duty.
• To pay a single sum as an equivalent for a number of successive payments; specifically, to purchase and use a commutation-ticket.

from the GNU version of the Collaborative International Dictionary of English.

• transitive verb To exchange; to put or substitute something else in place of, as a smaller penalty, obligation, or payment, for a greater, or a single thing for an aggregate; hence, to lessen; to diminish.
• intransitive verb To obtain or bargain for exemption or substitution; to effect a commutation.
• intransitive verb To pay, or arrange to pay, in gross instead of part by part.
• intransitive verb to travel regularly from a place of residence to another place, such as where one's daily work is performed. Often, such travel is performed between a suburb and a nearby city.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb intransitive To regularly travel from one's home to one's workplace, or vice versa.
• verb transitive, finance To pay out the lump-sum present value of an annuity, instead of paying in instalments.
• verb intransitive To pay, or arrange to pay, in gross instead of part by part.
• verb transitive, law, criminology To reduce the sentence previously given for a criminal offense.
• verb intransitive To obtain or bargain for exemption or substitution; to effect a commutation.
• verb intransitive, mathematics To engage in a commutative operation.
• noun The route one takes to travel to a workplace or back.
• noun The distance of that route.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb exchange positions without a change in value
• verb exchange a penalty for a less severe one
• verb change the order or arrangement of
• verb exchange or replace with another, usually of the same kind or category
• noun a regular journey of some distance to and from your place of work
• verb travel back and forth regularly, as between one's place of work and home