Merriam-Webster Collegiate Dictionary - to

 I. preposition  Etymology: Middle English, from Old English to; akin ~ Old High German zuo ~, Latin donec as long as, until  Date: before 12th century  1.  a. — used as a function word ~ indicate movement or an action or condition suggestive of movement ~ward a place, person, or thing reached drove ~ the city went back ~ the original idea went ~ lunch  b. — used as a function word ~ indicate direction a mile ~ the south turned his back ~ the door a tendency ~ silliness  c. — used as a function word ~ indicate contact or proximity applied polish ~ the table put her hand ~ her heart  d.  (1) — used as a function word ~ indicate the place or point that is the far limit 100 miles ~ the nearest ~wn  (2) — used as a function word ~ indicate the limit of extent stripped ~ the waist  e. — used as a function word ~ indicate relative position perpendicular ~ the floor  2.  a. — used as a function word ~ indicate purpose, intention, tendency, result, or end came ~ our aid drink ~ his health  b. — used as a function word ~ indicate the result of an action or a process broken all ~ pieces go ~ seed ~ their surprise, the train left on time  3. — used as a function word ~ indicate position or relation in time: as  a. before five minutes ~ five  b. till from eight ~ five up ~ now  4. — used as a function word ~ indicate addition, attachment, connection, belonging, possession, accompaniment, or response the key ~ the door danced ~ live music comes ~ her call  5. — used as a function word (1) ~ indicate the extent or degree (as of completeness or accuracy) loyal ~ a man generous ~ a fault or the extent and result (as of an action or a condition) beaten ~ death (2) ~ indicate the last or an intermediate point of a series moderate ~ cool temperatures  6.  a. — used as a function word (1) ~ indicate a relation ~ one that serves as a standard inferior ~ her earlier works (2) ~ indicate similarity, correspondence, dissimilarity, or proportion compared him ~ a god  b. — used as a function word ~ indicate agreement or conformity add salt ~ taste ~ my knowledge  c. — used as a function word ~ indicate a proportion in terms of numbers or quantities 400 ~ the box odds of ten ~ one  7.  a. — used as a function word (1) ~ indicate the application of an adjective or a noun agreeable ~ everyone attitude ~ friends title ~ the property (2) ~ indicate the relation of a verb ~ its complement or ~ a complementary element refers ~ the traditions refers us ~ the traditions (3) ~ indicate the receiver of an action or the one for which something is done or exists spoke ~ his mother gives a dollar ~ the man and often used with a reflexive pronoun ~ indicate exclusiveness (as of possession) or separateness had the house ~ themselves thought ~ herself  b. — used as a function word ~ indicate agency falls ~ his opponent's blows  8. — used as a function word ~ indicate that the following verb is an infinitive wants ~ go and often used by itself at the end of a clause in place of an infinitive suggested by the preceding context knows more than she seems ~  II. adverb  Date: before 12th century  1.  a. — used as a function word ~ indicate direction ~ward feathers wrong end ~ run ~ and fro  b. close ~ the wind the gale having gone over, we came ~ — R. H. Dana  2.  a. in~ contact especially with the frame — used of a door or a window the door snapped ~  b. — used as a function word ~ indicate physical application or attachment he…hath set ~ his seal — John 3:33(Authorized Version)  3. — used as a function word ~ indicate application or attention will stand ~ — Shakespeare  4. ~ a state of consciousness or awareness brings her ~ with smelling salts  5. at hand ; by get ~ see 'em close ~ — Richard Llewellyn TO  abbreviation  1. table of organization  2. traditional orthography  3. turnover