WordNet sense 1 (an interval during which a recurring sequence of events occurs):

cycle, rhythm

WordNet sense 2 ((sports) a period of play during which one team is on the offensive):

bout, turn

WordNet sense 3 (a regular route for a sentry or policeman):

beat

WordNet sense 4 (a serving to each of a group (usually alcoholic)):

round of drinks

WordNet sense 5 (a partsong in which voices follow each other; one voice starts and others join in one after another until all are singing different parts of the song at the same time):

troll

WordNet sense 6 (a crosspiece between the legs of a chair):

rung, stave

WordNet sense 7 (a charge of ammunition for a single shot):

unit of ammunition

WordNet sense 8 (any circular or rotating mechanism):

circle

WordNet sense 9 (be around):

encircle, ring, surround, environ

WordNet sense 10 (having a round shape tapered at one end):

pear-shaped

WordNet sense 11 (having a flat circular shape):

discoid

WordNet sense 12 (having the shape of a sphere or ball):

globular, orbicular, spherical

WordNet sense 13 (having a circular shape):

circular

WordNet sense 14 ((of sounds) full and rich):

orotund, rotund

WordNet sense 15 ((of sound) having marked depth and body):

full

WordNet sense 16 (pronounce with rounded lips):

labialise, labialize

WordNet sense 17 (not exact):

inexact

WordNet sense 18 (attack in speech or writing):

assail, assault, attack, snipe, lash out

WordNet sense 19 (bring to a highly developed, finished, or refined state):

polish, brush up, polish, round off, polish up

WordNet sense 20 (the activity of playing 18 holes of golf):

round of golf

WordNet sense 21 (the usual activities in your day):

daily round

WordNet sense 22 (express as a round number):

round out, round down

WordNet sense 23 (become round, plump, or shapely):

fill out, flesh out

WordNet sense 24 (from beginning to end; throughout):

around